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

[Chris Wilson]

Quoting Tomi Sarvela (2018-07-03 08:15:05)
> 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>

And plonked onto topic/core-for-CI. Imre I trust you'll raise the issue
with the authors?
-Chris