Hi Shimoda-san,
On Mon, Jun 29, 2020 at 12:04 PM Yoshihiro Shimoda
<yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
> > From: Geert Uytterhoeven, Sent: Friday, June 26, 2020 7:13 PM
> > On Fri, Jun 26, 2020 at 11:32 AM Yoshihiro Shimoda
> > <yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
> > > Note that v5.8-rc2 with r8a77951-salvator-xs seems to cause panic from
> > > PCI driver when the system is suspended. So, I disabled the PCI
> > > devices when I tested this patch series.
> >
> > Does this happen with current renesas-devel and renesas_defconfig?
> > (it doesn't for me)
>
> Yes. I enabled PM_DEBUG and E1000E though.
>
> > Do you have any PCIe devices attached? (I haven't)
>
> Yes. (Intel Ethernet card is connected to the PCI slot.)
>
> < my environment >
> - r8a77961-salvator-xs
> - renesas-devel-2020-06-26-v5.8-rc2
> + renesas_defconfig + PM_DEBUG + E1000E
> - initramfs
Doesn't fail for me on R-Car H3 ES2.0, so it needs the presence of a
PCIe card. Unfortunately I haven't any (added to shopping wishlist).
Is this the board in Magnus' farm?
I do have access to that one.
> ~ # echo mem > /sys/power/state
> [ 374.072298] PM: suspend entry (deep)
> [ 374.075994] Filesystems sync: 0.000 seconds
> [ 374.083159] Freezing user space processes ... (elapsed 0.001 seconds) done.
> [ 374.091570] OOM killer disabled.
> [ 374.094823] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
> [ 374.227534] e1000e: EEE TX LPI TIMER: 00000000
> [ 374.354388] SError Interrupt on CPU0, code 0xbf000002 -- SError
> [ 374.354390] CPU: 0 PID: 633 Comm: kworker/u12:4 Not tainted 5.8.0-rc2-arm64-renesas #57
> [ 374.354392] Hardware name: Renesas Salvator-X 2nd version board based on r8a77961 (DT)
> [ 374.354393] Workqueue: events_unbound async_run_entry_fn
> [ 374.354395] pstate: 40000085 (nZcv daIf -PAN -UAO BTYPE=--)
> [ 374.354396] pc : rcar_pci_read_reg+0xc/0x20
> [ 374.354397] lr : rcar_pcie_config_access+0xe4/0x1c0
> [ 374.354398] sp : ffff8000148aba80
> [ 374.354399] x29: ffff8000148aba80 x28: 0000000000000000
> [ 374.354402] x27: ffff800011fb0000 x26: 0000000000000000
> [ 374.354404] x25: 00000000000000cc x24: 0000000000000000
> [ 374.354406] x23: ffff8000148abb54 x22: 0000000000000000
> [ 374.354408] x21: ffff0006b484f800 x20: 0000000000000000
> [ 374.354411] x19: ffff0006b3a14580 x18: 0000000000000000
> [ 374.354413] x17: 0000000000000000 x16: 0000000000000000
> [ 374.354415] x15: 0000000000000000 x14: 000006e45d8ca55e
> [ 374.354417] x13: 0000000000000330 x12: 000000000000016d
> [ 374.354419] x11: 0000000000000000 x10: 0000000000000000
> [ 374.354421] x9 : ffff800012059120 x8 : ffff800011fb0948
> [ 374.354423] x7 : ffff8000105075a8 x6 : 0000000000000000
> [ 374.354425] x5 : ffff8000148abb54 x4 : 00000000000000cc
> [ 374.354427] x3 : 0000000000000000 x2 : ffff800013700018
> [ 374.354429] x1 : 0000000000000020 x0 : 00000000ffffffff
> [ 374.354432] Kernel panic - not syncing: Asynchronous SError Interrupt
> [ 374.354433] CPU: 0 PID: 633 Comm: kworker/u12:4 Not tainted 5.8.0-rc2-arm64-renesas #57
> [ 374.354434] Hardware name: Renesas Salvator-X 2nd version board based on r8a77961 (DT)
> [ 374.354435] Workqueue: events_unbound async_run_entry_fn
> [ 374.354437] Call trace:
> [ 374.354438] dump_backtrace+0x0/0x1d8
> [ 374.354439] show_stack+0x14/0x20
> [ 374.354439] dump_stack+0xe8/0x130
> [ 374.354440] panic+0x168/0x380
> [ 374.354441] nmi_panic+0x6c/0x70
> [ 374.354442] arm64_serror_panic+0x74/0x88
> [ 374.354443] do_serror+0x88/0x1a0
> [ 374.354444] el1_error+0x84/0x100
> [ 374.354444] rcar_pci_read_reg+0xc/0x20
> [ 374.354445] rcar_pcie_read_conf+0x38/0xb0
> [ 374.354446] pci_bus_read_config_word+0x84/0xe0
> [ 374.354447] pci_read_config_word+0x28/0x40
> [ 374.354448] pci_raw_set_power_state+0x108/0x2a8
> [ 374.354449] pci_set_power_state+0x5c/0x150
> [ 374.354450] pci_prepare_to_sleep+0x60/0x98
> [ 374.354451] pci_pm_suspend_noirq+0xe4/0x278
> [ 374.354451] dpm_run_callback+0x88/0x3c0
> [ 374.354452] __device_suspend_noirq+0x68/0x1f0
> [ 374.354453] async_suspend_noirq+0x20/0xa8
> [ 374.354454] async_run_entry_fn+0x44/0x108
> [ 374.354455] process_one_work+0x2a0/0x718
> [ 374.354456] worker_thread+0x40/0x458
> [ 374.354457] kthread+0x150/0x158
> [ 374.354457] ret_from_fork+0x10/0x18
> [ 374.354484] SMP: stopping secondary CPUs
> [ 374.354485] Kernel Offset: disabled
> [ 374.354486] CPU features: 0x200022,21006004
The failure mode looks like the PCI card is accessed while the PCI host
bridge has been suspended.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
