[Intel-gfx] [PATCH] usb/icl: Work around ACPI boottime crash

[Tomi Sarvela]

On 07/02/2018 11:18 PM, Chris Wilson wrote:
> Quoting Imre Deak (2018-07-02 14:57:56)
>> Work around the following boot time crash:
>>
>> [   10.456056] CPU: 1 PID: 220 Comm: systemd-udevd Tainted: G        W         4.17.0-rc7-CI-CI_DRM_4040+ #182
>> [   10.465828] Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP, BIOS
>> +ICLSFWR1.R00.2204.A00.1805172221 05/17/2018
>> [   10.479168] RIP: 0010:acpi_ps_complete_this_op+0xa7/0x22a
>> [   10.484627] RSP: 0018:ffffc900003a7578 EFLAGS: 00010202
>> [   10.489881] RAX: 6b6b6b6b6b6b6b6b RBX: ffff8804abeda9c8 RCX: 0000000000000020
>> [   10.497045] RDX: 0000000000000000 RSI: ffff88049e604a68 RDI: 0000000000000000
>> [   10.504213] RBP: 0000000000000000 R08: ffff8804abeda9c8 R09: 0000000000000000
>> [   10.511376] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000e
>> [   10.518542] R13: ffff88049e604a68 R14: ffff88049e604a68 R15: ffffffffa00263c2
>> [   10.525713] FS:  00007ff6d85f18c0(0000) GS:ffff8804be880000(0000) knlGS:0000000000000000
>> [   10.533839] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [   10.539616] CR2: 00007ff6d73cff40 CR3: 000000049f794001 CR4: 0000000000760ee0
>> [   10.546783] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> [   10.553949] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> [   10.561112] PKRU: 55555554
>> [   10.563849] Call Trace:
>> [   10.566323]  acpi_ps_complete_op+0x49/0x3f1
>> [   10.570537]  acpi_ps_parse_loop+0x94c/0x9bb
>> [   10.574754]  ? acpi_ds_delete_walk_state+0x113/0x131
...
>>
>> Cc: Chris Wilson <chris at chris-wilson.co.uk>
>> Signed-off-by: Imre Deak <imre.deak at intel.com>
> 
> T-b Tomi?
> -Chris

Tested with pre-release ICL hardware, and the patch helps with this 
particular boot-time crash.

Tested-by: Tomi Sarvela <tomi.p.sarvela at intel.com>

Tomi
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