[BUG 5.15-rc3] kernel BUG at drivers/gpu/drm/i915/i915_sw_fence.c:245!

[Steven Rostedt]

On Sat, 2 Oct 2021 03:17:29 -0700 (PDT)
Hugh Dickins <hughd at google.com> wrote:

> Yes (though bisection doesn't work right on this one): the fix

Interesting, as it appeared to be very reliable. But I didn't do the
"try before / after" on the patch.

> https://lore.kernel.org/lkml/1f955bff-fd9e-d2ee-132a-f758add9e9cb@google.com/
> seems to have got lost in the system: it has not even appeared in
> linux-next yet. I was going to send a reminder later this weekend.
> 
> Here it is again (but edited to replace "__aligned(4)" in the original
> by the official "__i915_sw_fence_call" I discovered afterwards; and
> ignoring recent discussions of where __attributes ought to appear :-)
> 
> 
> [PATCH] drm/i915: fix blank screen booting crashes

Thanks, I added it to my "fixes" patch set that I apply before testing.
It looks to have done the trick, and the kernel boots now.

Tested-by: Steven Rostedt (VMware) <rostedt at goodmis.org>

-- Steve