Re: About to tag v2.6.26-omap1, patch queue deleted, please checkand repost

"shekhar, chandra" <x0044955@xxxxxx> · Thu, 7 Aug 2008 19:13:01 +0530

Hi,

first - print is misleading, it should be i2c tarnsmit underflow.

I2C transmit underflow is because of interrupt handler error.
There was a patch to correct nack error ( ack for devices which are not 
present) which also removed some continue statement.
now a race condition arises where even xdr and xudf is simultaneously 
generated.
even if xdr is handled print goes to xudf and we get the print and hence 
error in return.  so it might happen that ur data is transferred
but u get error in return. i will send a patch by tomorrow to fix this

Regards
Chandra Shekhar

----- Original Message ----- 
From: "Tony Lindgren" <tony@xxxxxxxxxxx>
To: "David Brownell" <david-b@xxxxxxxxxxx>
Cc: <linux-omap@xxxxxxxxxxxxxxx>
Sent: Thursday, August 07, 2008 4:27 PM
Subject: Re: About to tag v2.6.26-omap1, patch queue deleted, please 
checkand repost

* David Brownell <david-b@xxxxxxxxxxx> [080807 02:30]:
On Tuesday 05 August 2008, Tony Lindgren wrote:
> Also please check that things work for your board,
> let's try to tag v2.6.26-omap1 within next few days so we can
> move on again.

Two problems on the OSK5912:

 - cpufreq oopses on boot
 - continuous i2c overflow errors

ISTR both of these bugs are in mainline too.  I'd say the
I2C regression is higher priority.

Hmm, I wonder what has broken I2C?

Anyways, let's fix these regressions before tagging.

Tony

- Dave

================ CPUFREQ oopsing
<5>Linux version 2.6.26-omap1 (db@blackbox) (gcc version 4.2.1 
(CodeSourcery Sourcery G++ Lite 2007q3-53)) #186 PREEMPT Wed Aug 6 
16:12:29 PDT 2008
CPU: ARM926EJ-S [41069263] revision 3 (ARMv5TEJ), cr=00053177
Machine: TI-OSK
Memory policy: ECC disabled, Data cache writeback
<7>On node 0 totalpages: 8192
<7>  DMA zone: 64 pages used for memmap
<7>  DMA zone: 0 pages reserved
<7>  DMA zone: 8128 pages, LIFO batch:0
<7>  Normal zone: 0 pages used for memmap
<7>  Movable zone: 0 pages used for memmap
OMAP1611b revision 2 handled as 16xx id: 26058c80eb051c15
<6>SRAM: Mapped pa 0x20000000 to va 0xd7000000 size: 0x100000
CPU0: D VIVT write-back cache
CPU0: I cache: 16384 bytes, associativity 4, 32 byte lines, 128 sets
CPU0: D cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 8128
<5>Kernel command line: console=ttyS0,115200 mem=32M ip=dhcp 
root=/dev/nfs i2c_omap.clock=400
<3>Unknown boot option `i2c_omap.clock=400': ignoring
Clocks: ARM_SYSST: 0x1000 DPLL_CTL: 0x2833 ARM_CKCTL: 0x2000
<6>Clocking rate (xtal/DPLL1/MPU): 12.0/192.0/192.0 MHz
Total of 128 interrupts in 4 interrupt banks
<6>OMAP GPIO hardware version 1.0
<4>MUX: initialized M7_1610_GPIO62
PID hash table entries: 128 (order: 7, 512 bytes)
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:    8
... MAX_LOCK_DEPTH:          48
... MAX_LOCKDEP_KEYS:        2048
... CLASSHASH_SIZE:           1024
... MAX_LOCKDEP_ENTRIES:     8192
... MAX_LOCKDEP_CHAINS:      16384
... CHAINHASH_SIZE:          8192
 memory used by lock dependency info: 992 kB
 per task-struct memory footprint: 1920 bytes
<6>Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
<6>Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
<6>Memory: 32MB = 32MB total
<5>Memory: 26936KB available (2476K code, 2919K data, 104K init)
<6>SLUB: Genslabs=12, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, 
Nodes=1
<7>Calibrating delay loop... 94.82 BogoMIPS (lpj=474112)
Mount-cache hash table entries: 512
<6>CPU: Testing write buffer coherency: ok
<6>net_namespace: 256 bytes
<6>NET: Registered protocol family 16
<4>MUX: initialized M19_1610_CAM_RSTZ
<4>MUX: initialized Y15_1610_CAM_OUTCLK
<4>MUX: initialized H19_1610_CAM_EXCLK
<4>MUX: initialized W13_1610_CCP_CLKM
<4>MUX: initialized Y12_1610_CCP_CLKP
<4>MUX: initialized W14_1610_CCP_DATAP
<4>MUX: initialized N20_1610_GPIO11
<4>MUX: initialized P20_1610_GPIO4
<4>MUX: initialized PWL
<6>OMAP DMA hardware version 1
<6>DMA capabilities: 000c0000:00000000:01ff:003f:007f
<6>omap_dsp_init() done
<1>Unable to handle kernel NULL pointer dereference at virtual address 
00000000
<1>pgd = c0004000
<1>[00000000] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT
Modules linked in:
CPU: 0    Not tainted  (2.6.26-omap1 #186)
PC is at wq_per_cpu+0xc/0x14
LR is at queue_delayed_work_on+0x90/0x124
pc : [<c005068c>]    lr : [<c00510f0>]    psr: 60000013
sp : c1c21dbc  ip : c1c21dcc  fp : c1c21dc8
r10: 00000292  r9 : 00000001  r8 : 00000000
r7 : 00000000  r6 : c0561c20  r5 : 00000000  r4 : c0561c04
r3 : 00000001  r2 : 00000000  r1 : 00000000  r0 : 00000000
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 0005317f  Table: 10004000  DAC: 00000017
Process swapper (pid: 1, stack limit = 0xc1c20260)
Stack: (0xc1c21dbc to 0xc1c22000)
1da0: 
c1c21df0
1dc0: c1c21dcc c00510f0 c0050690 c0561be0 00000292 c02aa654 c0561be0 
c1c38840
1de0: 00000000 c1c21e1c c1c21df4 c0175358 c0051070 00000000 00000000 
c1c38840
1e00: 00000001 00000000 00000000 c001c818 c1c21e38 c1c21e20 c0172e00 
c017514c
1e20: c1c21e5c c1c38840 00000000 c1c21e58 c1c21e3c c0173454 c0172d30 
c02980f0
1e40: c1c38840 00000000 c0561ad0 c1c21f28 c1c21e5c c0174428 c0173348 
00000001
1e60: 00000000 00000000 00000000 0002ee00 00005dc0 00989680 0002ee00 
0002ee00
1e80: 0002ee00 00000000 c02aa654 00000000 c1c38874 c1c38874 c0173dd4 
c0561bb0
1ea0: 00000000 c02704f9 00005dc0 0002ee00 00000000 00000000 00000000 
00000000
1ec0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
00000000
1ee0: 00000001 dead4ead ffffffff ffffffff c02d1f40 00000000 c02592d4 
c1c388e0
1f00: c1c388e0 00000000 c02aa3d0 c02a7680 c02af8c0 c02af8c8 00000000 
c1c21f54
1f20: c1c21f2c c0137920 c0174204 c1c04098 00000000 c02af8c0 00000000 
00000000
1f40: c0009d28 c1c20000 c1c21f68 c1c21f58 c001c228 c01378a8 c001d000 
c1c21f78
1f60: c1c21f6c c0009d4c c001c20c c1c21ff4 c1c21f7c c0008930 c0009d38 
00000000
1f80: 00000000 00000000 00000000 c1c21f00 c1c21f9c c003bcbc c003a888 
00000000
1fa0: 00000000 c1c21fb0 c0022b84 c003bcac 00000000 00000000 c0008884 
c00423c8
1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
00000000
1fe0: 00000000 00000000 00000000 c1c21ff8 c00423c8 c0008894 00000000 
00000000
Backtrace:
[<c0050680>] (wq_per_cpu+0x0/0x14) from [<c00510f0>] 
(queue_delayed_work_on+0x90/0x124)
[<c0051060>] (queue_delayed_work_on+0x0/0x124) from [<c0175358>] 
(cpufreq_governor_dbs+0x21c/0x30c)
[<c017513c>] (cpufreq_governor_dbs+0x0/0x30c) from [<c0172e00>] 
(__cpufreq_governor+0xe0/0x124)
[<c0172d20>] (__cpufreq_governor+0x0/0x124) from [<c0173454>] 
(__cpufreq_set_policy+0x11c/0x164)
 r6:00000000 r5:c1c38840 r4:c1c21e5c
[<c0173338>] (__cpufreq_set_policy+0x0/0x164) from [<c0174428>] 
(cpufreq_add_dev+0x234/0x304)
 r7:c0561ad0 r6:00000000 r5:c1c38840 r4:c02980f0
[<c01741f4>] (cpufreq_add_dev+0x0/0x304) from [<c0137920>] 
(sysdev_register+0x88/0xd0)
 r8:00000000 r7:c02af8c8 r6:c02af8c0 r5:c02a7680 r4:c02aa3d0
[<c0137898>] (sysdev_register+0x0/0xd0) from [<c001c228>] 
(register_cpu+0x2c/0x44)
 r8:c1c20000 r7:c0009d28 r6:00000000 r5:00000000 r4:c02af8c0
[<c001c1fc>] (register_cpu+0x0/0x44) from [<c0009d4c>] 
(topology_init+0x24/0x30)
 r4:c001d000
[<c0009d28>] (topology_init+0x0/0x30) from [<c0008930>] 
(kernel_init+0xac/0x250)
[<c0008884>] (kernel_init+0x0/0x250) from [<c00423c8>] 
(do_exit+0x0/0x644)
Code: c02d1bd8 e1a0c00d e92dd800 e24cb004 (e5900000)
<4>---[ end trace 1b75b31a2719ed1c ]---
<0>Kernel panic - not syncing: Attempted to kill init!

======================== #2 i2c overflows (after disabling cpufreq)
<5>Linux version 2.6.26-omap1 (db@blackbox) (gcc version 4.2.1 
(CodeSourcery Sourcery G++ Lite 2007q3-53)) #187 PREEMPT Wed Aug 6 
16:20:02 PDT 2008
CPU: ARM926EJ-S [41069263] revision 3 (ARMv5TEJ), cr=00053177
Machine: TI-OSK
Memory policy: ECC disabled, Data cache writeback
<7>On node 0 totalpages: 8192
<7>  DMA zone: 64 pages used for memmap
<7>  DMA zone: 0 pages reserved
<7>  DMA zone: 8128 pages, LIFO batch:0
<7>  Normal zone: 0 pages used for memmap
<7>  Movable zone: 0 pages used for memmap
OMAP1611b revision 2 handled as 16xx id: 26058c80eb051c15
<6>SRAM: Mapped pa 0x20000000 to va 0xd7000000 size: 0x100000
CPU0: D VIVT write-back cache
CPU0: I cache: 16384 bytes, associativity 4, 32 byte lines, 128 sets
CPU0: D cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 8128
<5>Kernel command line: console=ttyS0,115200 mem=32M ip=dhcp 
root=/dev/nfs i2c_omap.clock=400
<3>Unknown boot option `i2c_omap.clock=400': ignoring
Clocks: ARM_SYSST: 0x1000 DPLL_CTL: 0x2833 ARM_CKCTL: 0x2000
<6>Clocking rate (xtal/DPLL1/MPU): 12.0/192.0/192.0 MHz
Total of 128 interrupts in 4 interrupt banks
<6>OMAP GPIO hardware version 1.0
<4>MUX: initialized M7_1610_GPIO62
PID hash table entries: 128 (order: 7, 512 bytes)
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:    8
... MAX_LOCK_DEPTH:          48
... MAX_LOCKDEP_KEYS:        2048
... CLASSHASH_SIZE:           1024
... MAX_LOCKDEP_ENTRIES:     8192
... MAX_LOCKDEP_CHAINS:      16384
... CHAINHASH_SIZE:          8192
 memory used by lock dependency info: 992 kB
 per task-struct memory footprint: 1920 bytes
<6>Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
<6>Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
<6>Memory: 32MB = 32MB total
<5>Memory: 26952KB available (2460K code, 2918K data, 104K init)
<6>SLUB: Genslabs=12, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, 
Nodes=1
<7>Calibrating delay loop... 95.02 BogoMIPS (lpj=475136)
Mount-cache hash table entries: 512
<6>CPU: Testing write buffer coherency: ok
<6>net_namespace: 256 bytes
<6>NET: Registered protocol family 16
<4>MUX: initialized M19_1610_CAM_RSTZ
<4>MUX: initialized Y15_1610_CAM_OUTCLK
<4>MUX: initialized H19_1610_CAM_EXCLK
<4>MUX: initialized W13_1610_CCP_CLKM
<4>MUX: initialized Y12_1610_CCP_CLKP
<4>MUX: initialized W14_1610_CCP_DATAP
<4>MUX: initialized N20_1610_GPIO11
<4>MUX: initialized P20_1610_GPIO4
<4>MUX: initialized PWL
<6>OMAP DMA hardware version 1
<6>DMA capabilities: 000c0000:00000000:01ff:003f:007f
<6>omap_dsp_init() done
<4>MUX: initialized W4_USB_PUEN
USB: hmc 0, usb2 alt 0 wires
<6>i2c_omap i2c_omap.1: bus 1 rev2.2 at 400 kHz
<6>tps65010: version 2 May 2005
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<6>tps65010: power off button
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>tps65010: Failed to write vdcdc1 register
<3>i2c_omap i2c_omap.1: Transmit overflow
<3>tps65010: Failed to write vregs1 register
<5>SCSI subsystem initialized
<7>Switched to high resolution mode on CPU 0
<6>NET: Registered protocol family 2
<6>IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
<6>TCP established hash table entries: 1024 (order: 1, 8192 bytes)
<6>TCP bind hash table entries: 1024 (order: 3, 32768 bytes)
<6>TCP: Hash tables configured (established 1024 bind 1024)
<6>TCP reno registered
<6>NET: Registered protocol family 1
Power Management for TI OMAP.
<4>MUX: initialized T20_1610_LOW_PWR

... etc
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