Re: [PATCH v8 00/15] staging: mt7621-pci: avoid custom pci config read and writes

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On Thu, Aug 02, 2018 at 08:09:48AM +1000, NeilBrown wrote:
> On Wed, Aug 01 2018, Sergio Paracuellos wrote:
> 
> > This patch series include an attempt to avoid the use of custom
> > read and writes in driver code and use PCI subsystem common ones.
> >
> > In order to do this 'map_bus' callback is implemented and also
> > data structures for driver are included. The regs base address
> > ranges and data is being readed from device tree and the driver
> > gets clean a lot of code.
> >
> > This patchet also removes all legacy PCI code using now PCI_DRIVERS_GENERIC
> > kernel api.
> >
> > Changes in v8:
> >     - PATCH 1: don't check 'of_pci_range_to_resource' return value which is not
> >       being checked for the legacy code.
> >     - PATCH 1: call 'mt7621_pci_parse_request_of_pci_ranges' 'and setup_cm_memory_region'
> >       after the port initialization code.
> >     - PATCH 1: make use of 'pci_host_probe' to avoid code duplication in function
> >       'mt7621_pcie_register_host'.
> >     - PATCH 1: set resource limits with no limit for the end in 'ioport_resource' and 
> >       'iomem_resource'. It seems mips needs this to work properly.
> >     - Other patches rebased and adapted to this changes.
> 
> See boot log below.  Doesn't hang, but doesn't work.
> I'll try to schedule some time to see if I can work out what is
> happening.

Thanks for this. So the problem here is that PCI_IOBASE is not defined for mips.
I have reviewed al pci drivers included in mips/pci an no one is using actual code
but legacy one. Also all of them are changing the 'ioport_resource' end limit to 0xFFFFFFFF
(as I did in this series) to pass some checks along the code and that it just works because
the legacy code does not check of_pci_range_to_resource and is using 'ioremap' at itself. 

I have found a very interesting mail thread about this in the linux-mips mailing list:

https://www.linux-mips.org/archives/linux-mips/2015-12/msg00442.html

So I don't know what should be a good solution. Maybe we should define PCI_IOBASE properly
in the driver or just call to ioremap with the cpu_adress just changing the upper limit for
ioport_resource... What do you think? Anyway I am going to send v9 with the code I think we 
should start. It is just getting good things from v6 and this last v8 reducing code and getting
better code.

> 
> Thanks,
> NeilBrown

Best regards,
    Sergio Paracuellos

> 
> 
> 
> Starting kernel ...
> 
> [    0.000000] Linux version 4.18.0-rc7+ (neilb@noble) (gcc version 7.2.0 (GCC)) #273 SMP Thu Aug 2 08:02:45 AEST 2018
> [    0.000000] SoC Type: MediaTek MT7621 ver:1 eco:3
> [    0.000000] bootconsole [early0] enabled
> [    0.000000] CPU0 revision is: 0001992f (MIPS 1004Kc)
> [    0.000000] MIPS: machine is GB-PC1
> [    0.000000] Determined physical RAM map:
> [    0.000000]  memory: 1c000000 @ 00000000 (usable)
> [    0.000000]  memory: 04000000 @ 20000000 (usable)
> [    0.000000] Initrd not found or empty - disabling initrd
> [    0.000000] VPE topology {2,2} total 4
> [    0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
> [    0.000000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
> [    0.000000] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
> [    0.000000] Zone ranges:
> [    0.000000]   Normal   [mem 0x0000000000000000-0x000000001fffffff]
> [    0.000000]   HighMem  [mem 0x0000000020000000-0x0000000023ffffff]
> [    0.000000] Movable zone start for each node
> [    0.000000] Early memory node ranges
> [    0.000000]   node   0: [mem 0x0000000000000000-0x000000001bffffff]
> [    0.000000]   node   0: [mem 0x0000000020000000-0x0000000023ffffff]
> [    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000023ffffff]
> [    0.000000] random: get_random_bytes called from start_kernel+0xb4/0x4ec with crng_init=0
> [    0.000000] percpu: Embedded 15 pages/cpu @(ptrval) s30480 r8192 d22768 u61440
> [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 130048
> [    0.000000] Kernel command line: console=ttyS0,57600
> [    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
> [    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
> [    0.000000] Writing ErrCtl register=000108a2
> [    0.000000] Readback ErrCtl register=000108a2
> [    0.000000] Memory: 504788K/524288K available (6135K kernel code, 228K rwdata, 1052K rodata, 6524K init, 241K bss, 19500K reserved, 0K cma-reserved, 65536K highmem)
> [    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
> [    0.000000] Hierarchical RCU implementation.
> [    0.000000] NR_IRQS: 256
> [    0.000000] clocksource: GIC: mask: 0xffffffffffffffff max_cycles: 0xcf914c9718, max_idle_ns: 440795231327 ns
> [    0.000000] sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
> [    0.010000] Calibrating delay loop... 597.60 BogoMIPS (lpj=2988032)
> [    0.070000] pid_max: default: 32768 minimum: 301
> [    0.080000] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> [    0.090000] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
> [    0.100000] Hierarchical SRCU implementation.
> [    0.110000] smp: Bringing up secondary CPUs ...
> [    0.120000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
> [    0.120000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
> [    0.120000] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
> [    0.120000] CPU1 revision is: 0001992f (MIPS 1004Kc)
> [    0.180000] Synchronize counters for CPU 1: done.
> [    0.220000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
> [    0.220000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
> [    0.220000] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
> [    0.220000] CPU2 revision is: 0001992f (MIPS 1004Kc)
> [    0.280000] Synchronize counters for CPU 2: done.
> [    0.320000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
> [    0.320000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
> [    0.320000] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
> [    0.320000] CPU3 revision is: 0001992f (MIPS 1004Kc)
> [    0.380000] Synchronize counters for CPU 3: done.
> [    0.420000] smp: Brought up 1 node, 4 CPUs
> [    0.430000] devtmpfs: initialized
> [    0.480000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
> [    0.490000] futex hash table entries: 1024 (order: 3, 32768 bytes)
> [    0.500000] pinctrl core: initialized pinctrl subsystem
> [    0.510000] NET: Registered protocol family 16
> [    0.870000] ***** Xtal 40MHz *****
> [    0.880000] Port 0 N_FTS = 1b102800
> [    0.880000] Port 1 N_FTS = 1b102800
> [    0.890000] Port 2 N_FTS = 1b102800
> [    1.950000] PCIE0 enabled
> [    1.950000] PCIE1 enabled
> [    1.960000] PCIE2 enabled
> [    1.970000] PCI coherence region base: 0x60000000, mask/settings: 0xf0000002
> [    1.980000] ------------[ cut here ]------------
> [    1.990000] WARNING: CPU: 1 PID: 1 at ../drivers/pci/pci.c:3558 pci_remap_iospace+0x38/0x50
> [    2.000000] This architecture does not support memory mapped I/O
> [    2.020000] Modules linked in:
> [    2.020000] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.18.0-rc7+ #273
> [    2.030000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [    2.050000]         80da7a3e 0000003a 00000000 00000000 80710000 00000001 9bc73b40 1c044177
> [    2.070000]         00000000 00000000 80de0000 00000007 00000000 00000053 00000000 00000000
> [    2.080000]         00000000 00000052 80dd0000 6e207365 80710000 00000000 80730000 806cecec
> [    2.100000]         00000009 00000de6 9beac790 9beaf190 00000001 bc000000 00000004 80da0004
> [    2.120000]         ...
> [    2.120000] Call Trace:
> [    2.130000] [<8000bd34>] show_stack+0x8c/0x130
> [    2.130000] [<805dd724>] dump_stack+0x94/0xd0
> [    2.140000] [<80027c30>] __warn+0x10c/0x114
> [    2.150000] [<80027c78>] warn_slowpath_fmt+0x40/0x64
> [    2.160000] [<8036e368>] pci_remap_iospace+0x38/0x50
> [    2.170000] [<8049a174>] mt7621_pci_probe+0xc94/0xd20
> [    2.180000] [<803b1998>] platform_drv_probe+0x40/0x7c
> [    2.190000] [<803aff10>] driver_probe_device+0x314/0x46c
> [    2.200000] [<803b011c>] __driver_attach+0xb4/0x138
> [    2.210000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [    2.220000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [    2.230000] [<803b0a68>] driver_register+0xd0/0x118
> [    2.240000] [<80001618>] do_one_initcall+0x84/0x19c
> [    2.250000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [    2.260000] [<805f5ebc>] kernel_init+0x14/0x110
> [    2.270000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [    2.280000] ---[ end trace 4b133b219a5c8779 ]---
> [    2.290000] mt7621-pci 1e140000.pcie: PCI host bridge to bus 0000:00
> [    2.300000] pci_bus 0000:00: root bus resource [io  0xffffffff] (bus address [0x0000-0x0000])
> [    2.320000] pci_bus 0000:00: root bus resource [mem 0x60000000-0x6fffffff] (bus address [0x00000000-0x0fffffff])
> [    2.340000] pci_bus 0000:00: root bus resource [bus 00-ff]
> [    2.350000] pci 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
> [    2.370000] pci 0000:00:01.0: bridge configuration invalid ([bus 00-00]), reconfiguring
> [    2.380000] pci 0000:00:02.0: bridge configuration invalid ([bus 00-00]), reconfiguring
> [    2.400000] pci 0000:00:00.0: PCI bridge to [bus 01-ff]
> [    2.420000] pci 0000:00:01.0: PCI bridge to [bus 02-ff]
> [    2.430000] pci 0000:00:02.0: PCI bridge to [bus 03-ff]
> [    2.440000] pci 0000:00:00.0: BAR 0: no space for [mem size 0x80000000]
> [    2.450000] pci 0000:00:00.0: BAR 0: failed to assign [mem size 0x80000000]
> [    2.470000] pci 0000:00:01.0: BAR 0: no space for [mem size 0x80000000]
> [    2.480000] pci 0000:00:01.0: BAR 0: failed to assign [mem size 0x80000000]
> [    2.490000] pci 0000:00:02.0: BAR 0: no space for [mem size 0x80000000]
> [    2.510000] pci 0000:00:02.0: BAR 0: failed to assign [mem size 0x80000000]
> [    2.520000] pci 0000:00:00.0: BAR 8: assigned [mem 0x60000000-0x600fffff]
> [    2.530000] pci 0000:00:00.0: BAR 9: assigned [mem 0x60100000-0x601fffff pref]
> [    2.550000] pci 0000:00:01.0: BAR 8: assigned [mem 0x60200000-0x602fffff]
> [    2.560000] pci 0000:00:01.0: BAR 9: assigned [mem 0x60300000-0x603fffff pref]
> [    2.580000] pci 0000:00:02.0: BAR 8: assigned [mem 0x60400000-0x604fffff]
> [    2.590000] pci 0000:00:02.0: BAR 9: assigned [mem 0x60500000-0x605fffff pref]
> [    2.600000] pci 0000:00:00.0: BAR 1: assigned [mem 0x60600000-0x6060ffff]
> [    2.620000] pci 0000:00:01.0: BAR 1: assigned [mem 0x60610000-0x6061ffff]
> [    2.630000] pci 0000:00:02.0: BAR 1: assigned [mem 0x60620000-0x6062ffff]
> [    2.640000] pci 0000:00:00.0: BAR 7: no space for [io  size 0x1000]
> [    2.650000] pci 0000:00:00.0: BAR 7: failed to assign [io  size 0x1000]
> [    2.670000] pci 0000:00:01.0: BAR 7: no space for [io  size 0x1000]
> [    2.680000] pci 0000:00:01.0: BAR 7: failed to assign [io  size 0x1000]
> [    2.690000] pci 0000:00:02.0: BAR 7: no space for [io  size 0x1000]
> [    2.710000] pci 0000:00:02.0: BAR 7: failed to assign [io  size 0x1000]
> [    2.720000] pci 0000:01:00.0: BAR 5: assigned [mem 0x60000000-0x600001ff]
> [    2.730000] pci 0000:01:00.0: BAR 4: no space for [io  size 0x0010]
> [    2.740000] pci 0000:01:00.0: BAR 4: failed to assign [io  size 0x0010]
> [    2.760000] pci 0000:01:00.0: BAR 0: no space for [io  size 0x0008]
> [    2.770000] pci 0000:01:00.0: BAR 0: failed to assign [io  size 0x0008]
> [    2.780000] pci 0000:01:00.0: BAR 2: no space for [io  size 0x0008]
> [    2.790000] pci 0000:01:00.0: BAR 2: failed to assign [io  size 0x0008]
> [    2.810000] pci 0000:01:00.0: BAR 1: no space for [io  size 0x0004]
> [    2.820000] pci 0000:01:00.0: BAR 1: failed to assign [io  size 0x0004]
> [    2.830000] pci 0000:01:00.0: BAR 3: no space for [io  size 0x0004]
> [    2.840000] pci 0000:01:00.0: BAR 3: failed to assign [io  size 0x0004]
> [    2.860000] pci 0000:00:00.0: PCI bridge to [bus 01]
> [    2.870000] pci 0000:00:00.0:   bridge window [mem 0x60000000-0x600fffff]
> [    2.880000] pci 0000:00:00.0:   bridge window [mem 0x60100000-0x601fffff pref]
> [    2.890000] pci 0000:02:00.0: BAR 5: assigned [mem 0x60200000-0x602001ff]
> [    2.910000] pci 0000:02:00.0: BAR 4: no space for [io  size 0x0010]
> [    2.920000] pci 0000:02:00.0: BAR 4: failed to assign [io  size 0x0010]
> [    2.930000] pci 0000:02:00.0: BAR 0: no space for [io  size 0x0008]
> [    2.950000] pci 0000:02:00.0: BAR 0: failed to assign [io  size 0x0008]
> [    2.960000] pci 0000:02:00.0: BAR 2: no space for [io  size 0x0008]
> [    2.970000] pci 0000:02:00.0: BAR 2: failed to assign [io  size 0x0008]
> [    2.980000] pci 0000:02:00.0: BAR 1: no space for [io  size 0x0004]
> [    3.000000] pci 0000:02:00.0: BAR 1: failed to assign [io  size 0x0004]
> [    3.010000] pci 0000:02:00.0: BAR 3: no space for [io  size 0x0004]
> [    3.020000] pci 0000:02:00.0: BAR 3: failed to assign [io  size 0x0004]
> [    3.030000] pci 0000:00:01.0: PCI bridge to [bus 02]
> [    3.040000] pci 0000:00:01.0:   bridge window [mem 0x60200000-0x602fffff]
> [    3.060000] pci 0000:00:01.0:   bridge window [mem 0x60300000-0x603fffff pref]
> [    3.070000] pci 0000:03:00.0: BAR 5: assigned [mem 0x60400000-0x604001ff]
> [    3.080000] pci 0000:03:00.0: BAR 4: no space for [io  size 0x0010]
> [    3.100000] pci 0000:03:00.0: BAR 4: failed to assign [io  size 0x0010]
> [    3.110000] pci 0000:03:00.0: BAR 0: no space for [io  size 0x0008]
> [    3.120000] pci 0000:03:00.0: BAR 0: failed to assign [io  size 0x0008]
> [    3.130000] pci 0000:03:00.0: BAR 2: no space for [io  size 0x0008]
> [    3.150000] pci 0000:03:00.0: BAR 2: failed to assign [io  size 0x0008]
> [    3.160000] pci 0000:03:00.0: BAR 1: no space for [io  size 0x0004]
> [    3.170000] pci 0000:03:00.0: BAR 1: failed to assign [io  size 0x0004]
> [    3.180000] pci 0000:03:00.0: BAR 3: no space for [io  size 0x0004]
> [    3.200000] pci 0000:03:00.0: BAR 3: failed to assign [io  size 0x0004]
> [    3.210000] pci 0000:00:02.0: PCI bridge to [bus 03]
> [    3.220000] pci 0000:00:02.0:   bridge window [mem 0x60400000-0x604fffff]
> [    3.230000] pci 0000:00:02.0:   bridge window [mem 0x60500000-0x605fffff pref]
> [    3.320000] SCSI subsystem initialized
> [    3.330000] random: fast init done
> [    3.340000] clocksource: Switched to clocksource GIC
> [    3.360000] NET: Registered protocol family 2
> [    3.370000] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes)
> [    3.380000] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
> [    3.400000] TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
> [    3.410000] TCP: Hash tables configured (established 4096 bind 4096)
> [    3.420000] UDP hash table entries: 256 (order: 1, 8192 bytes)
> [    3.440000] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
> [    3.450000] NET: Registered protocol family 1
> [    8.430000] Initialise system trusted keyrings
> [    8.440000] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> [    8.570000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
> [    8.580000] jffs2: version 2.2. (NAND) (SUMMARY)  © 2001-2006 Red Hat, Inc.
> [    8.610000] SGI XFS with security attributes, no debug enabled
> [    8.660000] Key type asymmetric registered
> [    8.670000] Asymmetric key parser 'x509' registered
> [    8.680000] bounce: pool size: 64 pages
> [    8.690000] io scheduler noop registered
> [    8.690000] io scheduler deadline registered (default)
> [    8.700000] io scheduler mq-deadline registered (default)
> [    8.710000] io scheduler kyber registered
> [    8.730000] Serial: 8250/16550 driver, 3 ports, IRQ sharing disabled
> [    8.750000] console [ttyS0] disabled
> [    8.760000] 1e000c00.uartlite: ttyS0 at MMIO 0x1e000c00 (irq = 18, base_baud = 3125000) is a 16550A
> [    8.780000] console [ttyS0] enabled
> [    8.780000] console [ttyS0] enabled
> [    8.790000] bootconsole [early0] disabled
> [    8.790000] bootconsole [early0] disabled
> [    8.810000] cacheinfo: Failed to find cpu0 device node
> [    8.820000] cacheinfo: Unable to detect cache hierarchy for CPU 0
> [    8.910000] loop: module loaded
> [    8.920000] pci 0000:00:00.0: enabling device (0004 -> 0006)
> [    8.930000] ahci 0000:01:00.0: enabling device (0000 -> 0002)
> [    9.090000] ------------[ cut here ]------------
> [    9.090000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_save_initial_config+0x3c/0x3e0
> [    9.110000] Modules linked in:
> [    9.120000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [    9.120000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [    9.120000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b40 1c044177
> [    9.120000]         00000000 00000000 80de0000 00000007 00000000 0000010c 00000000 00000000
> [    9.120000]         00000000 0000010b 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [    9.120000]         00000009 000000e3 00000005 00000000 00000001 803a0508 00000000 80da0000
> [    9.120000]         ...
> [    9.120000] Call Trace:
> [    9.120000] [<8000bd34>] show_stack+0x8c/0x130
> [    9.120000] [<805dd724>] dump_stack+0x94/0xd0
> [    9.120000] [<80027c30>] __warn+0x10c/0x114
> [    9.120000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [    9.120000] [<803f696c>] ahci_save_initial_config+0x3c/0x3e0
> [    9.120000] [<803f4bfc>] ahci_init_one+0x46c/0xa40
> [    9.120000] [<80371cf0>] pci_device_probe+0x90/0x120
> [    9.120000] [<803aff10>] driver_probe_device+0x314/0x46c
> [    9.120000] [<803b011c>] __driver_attach+0xb4/0x138
> [    9.120000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [    9.120000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [    9.120000] [<803b0a68>] driver_register+0xd0/0x118
> [    9.120000] [<80001618>] do_one_initcall+0x84/0x19c
> [    9.120000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [    9.120000] [<805f5ebc>] kernel_init+0x14/0x110
> [    9.120000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [    9.380000] ---[ end trace 4b133b219a5c877a ]---
> [    9.390000] ahci 0000:01:00.0: forcing PORTS_IMPL to 0x1
> [    9.550000] ------------[ cut here ]------------
> [    9.550000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_reset_controller+0x2c/0x128
> [    9.570000] Modules linked in:
> [    9.580000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [    9.580000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [    9.580000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b48 1c044177
> [    9.580000]         00000000 00000000 80de0000 00000007 00000000 00000129 00000000 00000000
> [    9.580000]         00000000 00000128 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [    9.580000]         00000009 000000e3 00000005 9b7ac000 00000001 803a0508 00000000 80da0000
> [    9.580000]         ...
> [    9.580000] Call Trace:
> [    9.580000] [<8000bd34>] show_stack+0x8c/0x130
> [    9.580000] [<805dd724>] dump_stack+0x94/0xd0
> [    9.580000] [<80027c30>] __warn+0x10c/0x114
> [    9.580000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [    9.580000] [<803f6dac>] ahci_reset_controller+0x2c/0x128
> [    9.580000] [<803f4fb4>] ahci_init_one+0x824/0xa40
> [    9.580000] [<80371cf0>] pci_device_probe+0x90/0x120
> [    9.580000] [<803aff10>] driver_probe_device+0x314/0x46c
> [    9.580000] [<803b011c>] __driver_attach+0xb4/0x138
> [    9.580000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [    9.580000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [    9.580000] [<803b0a68>] driver_register+0xd0/0x118
> [    9.580000] [<80001618>] do_one_initcall+0x84/0x19c
> [    9.580000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [    9.580000] [<805f5ebc>] kernel_init+0x14/0x110
> [    9.580000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [    9.840000] ---[ end trace 4b133b219a5c877b ]---
> [   10.000000] ------------[ cut here ]------------
> [   10.000000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_reset_controller+0xc8/0x128
> [   10.020000] Modules linked in:
> [   10.030000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [   10.030000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [   10.030000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b48 1c044177
> [   10.030000]         00000000 00000000 80de0000 00000007 00000000 00000145 00000000 00000000
> [   10.030000]         00000000 00000144 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [   10.030000]         00000009 000000e3 00000005 9b7ac000 00000001 803a0508 00000000 80da0000
> [   10.030000]         ...
> [   10.030000] Call Trace:
> [   10.030000] [<8000bd34>] show_stack+0x8c/0x130
> [   10.030000] [<805dd724>] dump_stack+0x94/0xd0
> [   10.030000] [<80027c30>] __warn+0x10c/0x114
> [   10.030000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [   10.030000] [<803f6e48>] ahci_reset_controller+0xc8/0x128
> [   10.030000] [<803f4fb4>] ahci_init_one+0x824/0xa40
> [   10.030000] [<80371cf0>] pci_device_probe+0x90/0x120
> [   10.030000] [<803aff10>] driver_probe_device+0x314/0x46c
> [   10.030000] [<803b011c>] __driver_attach+0xb4/0x138
> [   10.030000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [   10.030000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [   10.030000] [<803b0a68>] driver_register+0xd0/0x118
> [   10.030000] [<80001618>] do_one_initcall+0x84/0x19c
> [   10.030000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [   10.030000] [<805f5ebc>] kernel_init+0x14/0x110
> [   10.030000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [   10.290000] ---[ end trace 4b133b219a5c877c ]---
> [   10.300000] ahci 0000:01:00.0: AHCI 0000.0000 1 slots 1 ports ? Gbps 0x1 impl IDE mode
> [   10.320000] ahci 0000:01:00.0: flags: 
> [   10.330000] scsi host0: ahci
> [   10.340000] ata1: SATA max UDMA/133 abar m512@0x60000000 port 0x60000100 irq 23
> [   10.350000] pci 0000:00:01.0: enabling device (0004 -> 0006)
> [   10.370000] ahci 0000:02:00.0: enabling device (0000 -> 0002)
> [   10.530000] ------------[ cut here ]------------
> [   10.530000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_save_initial_config+0x3c/0x3e0
> [   10.550000] Modules linked in:
> [   10.560000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [   10.560000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [   10.560000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b40 1c044177
> [   10.560000]         00000000 00000000 80de0000 00000007 00000000 00000167 00000000 00000000
> [   10.560000]         00000000 00000166 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [   10.560000]         00000009 000000e3 00000005 00000000 00000001 803a0508 00000000 80da0000
> [   10.560000]         ...
> [   10.560000] Call Trace:
> [   10.560000] [<8000bd34>] show_stack+0x8c/0x130
> [   10.560000] [<805dd724>] dump_stack+0x94/0xd0
> [   10.560000] [<80027c30>] __warn+0x10c/0x114
> [   10.560000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [   10.560000] [<803f696c>] ahci_save_initial_config+0x3c/0x3e0
> [   10.560000] [<803f4bfc>] ahci_init_one+0x46c/0xa40
> [   10.560000] [<80371cf0>] pci_device_probe+0x90/0x120
> [   10.560000] [<803aff10>] driver_probe_device+0x314/0x46c
> [   10.560000] [<803b011c>] __driver_attach+0xb4/0x138
> [   10.560000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [   10.560000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [   10.560000] [<803b0a68>] driver_register+0xd0/0x118
> [   10.560000] [<80001618>] do_one_initcall+0x84/0x19c
> [   10.560000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [   10.560000] [<805f5ebc>] kernel_init+0x14/0x110
> [   10.560000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [   10.820000] ---[ end trace 4b133b219a5c877d ]---
> [   10.830000] ahci 0000:02:00.0: forcing PORTS_IMPL to 0x1
> [   10.990000] ------------[ cut here ]------------
> [   10.990000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_reset_controller+0x2c/0x128
> [   11.010000] Modules linked in:
> [   11.020000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [   11.020000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [   11.020000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b48 1c044177
> [   11.020000]         00000000 00000000 80de0000 00000007 00000000 00000184 00000000 00000000
> [   11.020000]         00000000 00000183 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [   11.020000]         00000009 000000e3 00000005 9a0b0000 00000001 803a0508 00000000 80da0000
> [   11.020000]         ...
> [   11.020000] Call Trace:
> [   11.020000] [<8000bd34>] show_stack+0x8c/0x130
> [   11.020000] [<805dd724>] dump_stack+0x94/0xd0
> [   11.020000] [<80027c30>] __warn+0x10c/0x114
> [   11.020000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [   11.020000] [<803f6dac>] ahci_reset_controller+0x2c/0x128
> [   11.020000] [<803f4fb4>] ahci_init_one+0x824/0xa40
> [   11.020000] [<80371cf0>] pci_device_probe+0x90/0x120
> [   11.020000] [<803aff10>] driver_probe_device+0x314/0x46c
> [   11.020000] [<803b011c>] __driver_attach+0xb4/0x138
> [   11.020000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [   11.020000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [   11.020000] [<803b0a68>] driver_register+0xd0/0x118
> [   11.020000] [<80001618>] do_one_initcall+0x84/0x19c
> [   11.020000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [   11.020000] [<805f5ebc>] kernel_init+0x14/0x110
> [   11.020000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [   11.280000] ---[ end trace 4b133b219a5c877e ]---
> [   11.440000] ------------[ cut here ]------------
> [   11.440000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_reset_controller+0xc8/0x128
> [   11.460000] Modules linked in:
> [   11.470000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [   11.470000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [   11.470000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b48 1c044177
> [   11.470000]         00000000 00000000 80de0000 00000007 00000000 000001a0 00000000 00000000
> [   11.470000]         00000000 0000019f 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [   11.470000]         00000009 000000e3 00000005 9a0b0000 00000001 803a0508 00000000 80da0000
> [   11.470000]         ...
> [   11.470000] Call Trace:
> [   11.470000] [<8000bd34>] show_stack+0x8c/0x130
> [   11.470000] [<805dd724>] dump_stack+0x94/0xd0
> [   11.470000] [<80027c30>] __warn+0x10c/0x114
> [   11.470000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [   11.470000] [<803f6e48>] ahci_reset_controller+0xc8/0x128
> [   11.470000] [<803f4fb4>] ahci_init_one+0x824/0xa40
> [   11.470000] [<80371cf0>] pci_device_probe+0x90/0x120
> [   11.470000] [<803aff10>] driver_probe_device+0x314/0x46c
> [   11.470000] [<803b011c>] __driver_attach+0xb4/0x138
> [   11.470000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [   11.470000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [   11.470000] [<803b0a68>] driver_register+0xd0/0x118
> [   11.470000] [<80001618>] do_one_initcall+0x84/0x19c
> [   11.470000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [   11.470000] [<805f5ebc>] kernel_init+0x14/0x110
> [   11.470000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [   11.730000] ---[ end trace 4b133b219a5c877f ]---
> [   11.740000] ahci 0000:02:00.0: AHCI 0000.0000 1 slots 1 ports ? Gbps 0x1 impl IDE mode
> [   11.760000] ahci 0000:02:00.0: flags: 
> [   11.770000] scsi host1: ahci
> [   11.780000] ata2: SATA max UDMA/133 abar m512@0x60200000 port 0x60200100 irq 24
> [   11.790000] pci 0000:00:02.0: enabling device (0004 -> 0006)
> [   11.800000] ahci 0000:03:00.0: enabling device (0000 -> 0002)
> [   11.970000] ------------[ cut here ]------------
> [   11.970000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_save_initial_config+0x3c/0x3e0
> [   11.990000] Modules linked in:
> [   12.000000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [   12.000000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [   12.000000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b40 1c044177
> [   12.000000]         00000000 00000000 80de0000 00000007 00000000 000001c2 00000000 00000000
> [   12.000000]         00000000 000001c1 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [   12.000000]         00000009 000000e3 00000005 00000000 00000001 803a0508 00000000 80da0000
> [   12.000000]         ...
> [   12.000000] Call Trace:
> [   12.000000] [<8000bd34>] show_stack+0x8c/0x130
> [   12.000000] [<805dd724>] dump_stack+0x94/0xd0
> [   12.000000] [<80027c30>] __warn+0x10c/0x114
> [   12.000000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [   12.000000] [<803f696c>] ahci_save_initial_config+0x3c/0x3e0
> [   12.000000] [<803f4bfc>] ahci_init_one+0x46c/0xa40
> [   12.000000] [<80371cf0>] pci_device_probe+0x90/0x120
> [   12.000000] [<803aff10>] driver_probe_device+0x314/0x46c
> [   12.000000] [<803b011c>] __driver_attach+0xb4/0x138
> [   12.000000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [   12.000000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [   12.000000] [<803b0a68>] driver_register+0xd0/0x118
> [   12.000000] [<80001618>] do_one_initcall+0x84/0x19c
> [   12.000000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [   12.000000] [<805f5ebc>] kernel_init+0x14/0x110
> [   12.000000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [   12.260000] ---[ end trace 4b133b219a5c8780 ]---
> [   12.260000] ata1: failed to resume link (SControl 0)
> [   12.270000] ahci 0000:03:00.0: forcing PORTS_IMPL to 0x1
> [   12.280000] ata1: SATA link down (SStatus 0 SControl 0)
> [   12.440000] ------------[ cut here ]------------
> [   12.440000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_reset_controller+0x2c/0x128
> [   12.460000] Modules linked in:
> [   12.470000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [   12.470000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [   12.470000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b48 1c044177
> [   12.470000]         00000000 00000000 80de0000 00000007 00000000 000001e1 00000000 00000000
> [   12.470000]         00000000 000001e0 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [   12.470000]         00000009 000000e3 00000005 9a0b8000 00000001 803a0508 00000000 80da0000
> [   12.470000]         ...
> [   12.470000] Call Trace:
> [   12.470000] [<8000bd34>] show_stack+0x8c/0x130
> [   12.470000] [<805dd724>] dump_stack+0x94/0xd0
> [   12.470000] [<80027c30>] __warn+0x10c/0x114
> [   12.470000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [   12.470000] [<803f6dac>] ahci_reset_controller+0x2c/0x128
> [   12.470000] [<803f4fb4>] ahci_init_one+0x824/0xa40
> [   12.470000] [<80371cf0>] pci_device_probe+0x90/0x120
> [   12.470000] [<803aff10>] driver_probe_device+0x314/0x46c
> [   12.470000] [<803b011c>] __driver_attach+0xb4/0x138
> [   12.470000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [   12.470000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [   12.470000] [<803b0a68>] driver_register+0xd0/0x118
> [   12.470000] [<80001618>] do_one_initcall+0x84/0x19c
> [   12.470000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [   12.470000] [<805f5ebc>] kernel_init+0x14/0x110
> [   12.470000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [   12.730000] ---[ end trace 4b133b219a5c8781 ]---
> [   12.890000] ------------[ cut here ]------------
> [   12.890000] WARNING: CPU: 0 PID: 1 at ../drivers/ata/libahci.c:227 ahci_reset_controller+0xc8/0x128
> [   12.910000] Modules linked in:
> [   12.920000] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.18.0-rc7+ #273
> [   12.920000] Stack : 00000000 00000004 00000006 00000000 00000000 00000000 00000000 00000000
> [   12.920000]         80da7a3e 0000004a 00000000 00000000 80710000 00000001 9bc73b48 1c044177
> [   12.920000]         00000000 00000000 80de0000 00000007 00000000 000001fd 00000000 00000000
> [   12.920000]         00000000 000001fc 80dd0000 65726568 80710000 00000000 80730000 806dc1fc
> [   12.920000]         00000009 000000e3 00000005 9a0b8000 00000001 803a0508 00000000 80da0000
> [   12.920000]         ...
> [   12.920000] Call Trace:
> [   12.920000] [<8000bd34>] show_stack+0x8c/0x130
> [   12.920000] [<805dd724>] dump_stack+0x94/0xd0
> [   12.920000] [<80027c30>] __warn+0x10c/0x114
> [   12.920000] [<80027ce0>] warn_slowpath_null+0x44/0x58
> [   12.920000] [<803f6e48>] ahci_reset_controller+0xc8/0x128
> [   12.920000] [<803f4fb4>] ahci_init_one+0x824/0xa40
> [   12.920000] [<80371cf0>] pci_device_probe+0x90/0x120
> [   12.920000] [<803aff10>] driver_probe_device+0x314/0x46c
> [   12.920000] [<803b011c>] __driver_attach+0xb4/0x138
> [   12.920000] [<803ad9c0>] bus_for_each_dev+0x6c/0xb0
> [   12.920000] [<803aebf8>] bus_add_driver+0x204/0x24c
> [   12.920000] [<803b0a68>] driver_register+0xd0/0x118
> [   12.920000] [<80001618>] do_one_initcall+0x84/0x19c
> [   12.920000] [<80741ed0>] kernel_init_freeable+0x248/0x250
> [   12.920000] [<805f5ebc>] kernel_init+0x14/0x110
> [   12.920000] [<800066f8>] ret_from_kernel_thread+0x14/0x1c
> [   13.180000] ---[ end trace 4b133b219a5c8782 ]---
> [   13.190000] ahci 0000:03:00.0: AHCI 0000.0000 1 slots 1 ports ? Gbps 0x1 impl IDE mode
> [   13.210000] ahci 0000:03:00.0: flags: 
> [   13.220000] scsi host2: ahci
> [   13.230000] ata3: SATA max UDMA/133 abar m512@0x60400000 port 0x60400100 irq 25
> [   13.250000] libphy: Fixed MDIO Bus: probed
> [   13.260000] tun: Universal TUN/TAP device driver, 1.6
> [   13.270000] sdhci: Secure Digital Host Controller Interface driver
> [   13.280000] sdhci: Copyright(c) Pierre Ossman
> [   13.290000] spi-mt7621 1e000b00.spi: sys_freq: 225000000
> [   13.310000] m25p80 spi0.0: w25q256 (32768 Kbytes)
> [   13.320000] 4 fixed-partitions partitions found on MTD device spi0.0
> [   13.330000] Creating 4 MTD partitions on "spi0.0":
> [   13.340000] 0x000000000000-0x000000030000 : "u-boot"
> [   13.360000] 0x000000030000-0x000000040000 : "u-boot-env"
> [   13.380000] 0x000000040000-0x000000050000 : "factory"
> [   13.390000] 0x000000050000-0x000002000000 : "firmware"
> [   13.460000] libphy: mdio: probed
> [   13.500000] mtk_soc_eth 1e100000.ethernet: generated random MAC address 6a:98:31:db:8d:07
> [   13.520000] mtk_soc_eth 1e100000.ethernet eth0: mediatek frame engine at 0xbe100000, irq 21
> [   13.550000] NET: Registered protocol family 10
> [   13.570000] Segment Routing with IPv6
> [   13.570000] NET: Registered protocol family 17
> [   13.580000] 8021q: 802.1Q VLAN Support v1.8
> [   13.600000] Loading compiled-in X.509 certificates
> [   13.610000] hctosys: unable to open rtc device (rtc0)
> [   13.620000] ata2: failed to resume link (SControl 0)
> [   13.630000] ata2: SATA link down (SStatus 0 SControl 0)
> [   13.680000] mmc0: new high speed SD card at address 0002
> [   13.700000] mmcblk0: mmc0:0002 00000 1.88 GiB 
> [   14.360000] ata3: failed to resume link (SControl 0)
> [   14.360000] ata3: SATA link down (SStatus 0 SControl 0)
> [   14.400000] Freeing unused kernel memory: 6524K
> [   14.410000] This architecture does not have kernel memory protection.
> [   14.630000] usbcore: registered new interface driver usbfs
> [   14.650000] usbcore: registered new interface driver hub
> [   14.670000] usbcore: registered new device driver usb
> [   14.780000] xhci-mtk 1e1c0000.xhci: xHCI Host Controller
> [   14.790000] xhci-mtk 1e1c0000.xhci: new USB bus registered, assigned bus number 1
> [   14.810000] xhci-mtk 1e1c0000.xhci: hcc params 0x01401198 hci version 0x96 quirks 0x0000000000210010
> [   14.830000] xhci-mtk 1e1c0000.xhci: irq 20, io mem 0x1e1c0000
> [   14.870000] hub 1-0:1.0: USB hub found
> [   14.880000] hub 1-0:1.0: 2 ports detected
> [   14.900000] xhci-mtk 1e1c0000.xhci: xHCI Host Controller
> [   14.910000] xhci-mtk 1e1c0000.xhci: new USB bus registered, assigned bus number 2
> [   14.930000] xhci-mtk 1e1c0000.xhci: Host supports USB 3.0  SuperSpeed
> [   14.940000] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
> [   14.980000] hub 2-0:1.0: USB hub found
> [   14.990000] hub 2-0:1.0: 1 port detected
> [   15.050000] usbcore: registered new interface driver usb-storage
> [   15.410000] Waiting disk spinup and searching for partition GNUBEE-ROOT...
> [   15.420000] usb 1-2: new high-speed USB device number 2 using xhci-mtk
> [   15.640000] hub 1-2:1.0: USB hub found
> [   15.650000] hub 1-2:1.0: 4 ports detected
> [   15.870000] mtk_soc_eth 1e100000.ethernet eth0: port 0 link up
> [   18.440000] done.
> mdadm: No devices listed in conf file were found.
> findfs: unable to resolve 'PARTLABEL=GNUBEE-CRYPT-ROOT'
> [   19.980000] EXT4-fs (mmcblk0): INFO: recovery required on readonly filesystem
> [   19.990000] EXT4-fs (mmcblk0): write access will be enabled during recovery
> [   20.020000] msdc0 -> TUNE_BREAD<PASS> dcrc<0x0> DATRDDLY0/1<0x10101010><0x0> dsmpl<0x0> <- msdc_tune_bread() : L<1342> PID<kworker/3:0H><0x1c>
> [   21.160000] EXT4-fs (mmcblk0): recovery complete
> [   21.180000] EXT4-fs (mmcblk0): mounted filesystem with ordered data mode. Opts: (null)
> [   21.210000] Partition GNUBEE-ROOT found. Starting...
> [   22.690000] systemd[1]: System time before build time, advancing clock.
> [   22.840000] random: systemd: uninitialized urandom read (16 bytes read)
> [   22.870000] systemd[1]: systemd 232 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
> [   22.910000] systemd[1]: Detected architecture mips.
> 
> Welcome to Debian GNU/Linux 9 (stretch)!
> 
> [   22.970000] systemd[1]: Set hostname to <gnubeaver.brown>.
> [   23.100000] random: systemd: uninitialized urandom read (16 bytes read)
> [   23.150000] random: systemd-gpt-aut: uninitialized urandom read (16 bytes read)
> [   23.890000] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
> [  OK  ] Started Dispatch Password Requests to Console Directory Watch.
> [   23.950000] systemd[1]: Created slice System Slice.
> [  OK  ] Created slice System Slice.
> [   24.000000] systemd[1]: Reached target Remote File Systems.
> [  OK  ] Reached target Remote File Systems.
> [   24.060000] systemd[1]: Created slice system-getty.slice.
> [  OK  ] Created slice system-getty.slice.
> [   24.120000] systemd[1]: Listening on Syslog Socket.
> [  OK  ] Listening on Syslog Socket.
> [   24.160000] systemd[1]: dev-hugepages.mount: Couldn't determine result for ConditionVirtualization=!private-users, assuming failed: No such file or directory
> [   24.190000] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
> [  OK  ] Listening on /dev/initctl Compatibility Named Pipe.
> [  OK  ] Started Forward Password Requests to Wall Directory Watch.
> [  OK  ] Reached target Encrypted Volumes.
> [  OK  ] Reached target Swap.
> [  OK  ] Listening on udev Kernel Socket.
> [  OK  ] Listening on udev Control Socket.
>          Mounting Debug File System...
> [  OK  ] Created slice User and Session Slice.
> [  OK  ] Listening on Journal Socket.
>          Starting Load Kernel Modules...
>          Starting Set the console keyboard layout...
>          Starting Create list of required st…ce nodes for the current kernel...
> [  OK  ] Reached target Slices.
> [  OK  ] Listening on Journal Socket (/dev/log).
> [  OK  ] Listening on fsck to fsckd communication Socket.
>          Starting File System Check on Root Device...
> [  OK  ] Created slice system-serial\x2dgetty.slice.
> [  OK  ] Reached target Paths.
>          Starting Journal Service...
> [  OK  ] Mounted Debug File System.
> [  OK  ] Started Load Kernel Modules.
> [   25.180000] random: crng init done
> [   25.190000] random: 7 urandom warning(s) missed due to ratelimiting
> [  OK  ] Started Create list of required sta…vice nodes for the current kernel.
> [  OK  ] Started File System Check on Root Device.
> [  OK  ] Started File System Check Daemon to report status.
>          Starting Remount Root and Kernel File Systems...
>          Starting Create Static Device Nodes in /dev...
>          Starting Apply Kernel Variables...
> [  OK  ] Started Set the console keyboard layout.
> [  OK  ] Started Apply Kernel Variables.
> [  OK  ] Started Create Static Device Nodes in /dev.
>          Starting udev Kernel Device Manager...
> [   25.860000] EXT4-fs (mmcblk0): re-mounted. Opts: errors=remount-ro
> [  OK  ] Started Remount Root and Kernel File Systems.
> [  OK  ] Reached target Local File Systems (Pre).
>          Starting udev Coldplug all Devices...
>          Starting Load/Save Random Seed...
> [  OK  ] Reached target Local File Systems.
>          Starting Set console font and keymap...
>          Starting Raise network interfaces...
> [  OK  ] Started Journal Service.
> [  OK  ] Started udev Kernel Device Manager.
> [  OK  ] Started Load/Save Random Seed.
> [  OK  ] Started Set console font and keymap.
>          Starting Flush Journal to Persistent Storage...
> [   26.780000] systemd-journald[650]: Received request to flush runtime journal from PID 1
> [  OK  ] Started Flush Journal to Persistent Storage.
>          Starting Create Volatile Files and Directories...
> [  OK  ] Started Create Volatile Files and Directories.
>          Starting Update UTMP about System Boot/Shutdown...
>          Starting Network Time Synchronization...
> [  OK  ] Started udev Coldplug all Devices.
> [  OK  ] Found device /dev/ttyS0.
> [  OK  ] Started Update UTMP about System Boot/Shutdown.
> [  OK  ] Started Network Time Synchronization.
> [  OK  ] Reached target System Time Synchronized.
> [  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
> [  OK  ] Reached target System Initialization.
> [  OK  ] Started Daily apt download activities.
> [  OK  ] Started Daily Cleanup of Temporary Directories.
> [  OK  ] Started Daily apt upgrade and clean activities.
> [  OK  ] Reached target Timers.
> [  OK  ] Listening on D-Bus System Message Bus Socket.
> [  OK  ] Reached target Sockets.
> [  OK  ] Reached target Basic System.
> [  OK  ] Started Regular background p[   28.750000] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> rogram processin[   28.760000] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> g daemon.
>          Starting LSB: Execute the kexec -e command to reboot system...
>          Starting LSB: Mount debugfs on /sys/kernel/debug...
>          Starting System Logging Service...
> [  OK  ] Started Self Monitoring and Reporting Technology (SMART) Daemon.
> [  OK  ] Started D-Bus System Message Bus.
>          Starting Login Service...
> [  OK  ] Started System Logging Service.
> [  OK  ] Started Login Service.
> [  OK  ] Started LSB: Execute the kexec -e command to reboot system.
>          Starting LSB: Load kernel image with kexec...
> [  OK  ] Started LSB: Mount debugfs on /sys/kernel/debug.
> [  OK  ] Started LSB: Load kernel image with kexec.
> [FAILED] Failed to start Raise network interfaces.
> See 'systemctl status networking.service' for details.
> [  OK  ] Reached target Network.
> [  OK  ] Reached target Network is Online.
>          Starting /etc/rc.local Compatibility...
>          Starting LSB: Advanced IEEE 802.11 management daemon...
> [  OK  ] Started BIND Domain Name Server.
> [  OK  ] Reached target Host and Network Name Lookups.
>          Starting The Apache HTTP Server...
>          Starting LSB: exim Mail Transport Agent...
>          Starting LSB: DHCP server...
>          Starting OpenBSD Secure Shell server...
>          Starting Permit User Sessions...
> [  OK  ] Started LSB: Advanced IEEE 802.11 management daemon.
> [  OK  ] Started Permit User Sessions.
> [  OK  ] Started OpenBSD Secure Shell server.
> [  OK  ] Started The Apache HTTP Server.
> [FAILED] Failed to start LSB: DHCP server.
> See 'systemctl status isc-dhcp-server.service' for details.
> [  OK  ] Started LSB: exim Mail Transport Agent.
> [   40.051587] rc.local[914]:  2 Aug 08:04:00 ntpdate[915]: step time server 220.158.215.21 offset 121957.604033 sec
>          Starting Daily apt download activities...
> [  OK  ] Started /etc/rc.local Compatibility.
> [  OK  ] Started Serial Getty on ttyS0.
> [  OK  ] Reached target Login Prompts.
> [  OK  ] Reached target Multi-User System.
> [  OK  ] Reached target Graphical Interface.
>          Starting Update UTMP about System Runlevel Changes...
> [  OK  ] Started Update UTMP about System Runlevel Changes.
> 
> Debian GNU/Linux 9 gnubeaver.brown ttyS0
> 
> gnubeaver login: root
> Password: 
> Last login: Tue Jul 31 22:14:06 AEST 2018 on ttyS0
> Linux gnubeaver.brown 4.18.0-rc7+ #273 SMP Thu Aug 2 08:02:45 AEST 2018 mips
> 
> The programs included with the Debian GNU/Linux system are free software;
> the exact distribution terms for each program are described in the
> individual files in /usr/share/doc/*/copyright.
> 
> Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
> permitted by applicable law.
>                                                                                                                                       resize: unknown character, exiting.
> root@gnubeaver:~# lspci
> 00:00.0 PCI bridge: Device 0e8d:0801 (rev 01)
> 00:01.0 PCI bridge: Device 0e8d:0801 (rev 01)
> 00:02.0 PCI bridge: Device 0e8d:0801 (rev 01)
> 01:00.0 IDE interface: ASMedia Technology Inc. ASM1061 SATA IDE Controller (rev 02)
> 02:00.0 IDE interface: ASMedia Technology Inc. ASM1061 SATA IDE Controller (rev 02)
> 03:00.0 IDE interface: ASMedia Technology Inc. ASM1061 SATA IDE Controller (rev 02)
> root@gnubeaver:~# 
> root@gnubeaver:~# cat /proc/partitions 
> major minor  #blocks  name
> 
>   31        0        192 mtdblock0
>   31        1         64 mtdblock1
>   31        2         64 mtdblock2
>   31        3      32448 mtdblock3
>  179        0    1974272 mmcblk0
> root@gnubeaver:~# 
> root@gnubeaver:~# 


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