Re: [PATCH] drm/i915/selftests: Use clear_and_wake_up_bit() for the per-engine reset bitlocks

On Thu, Nov 04, 2021 at 01:58:44PM +0100, Thomas Hellström wrote: > Some selftests assume that nothing will attempt to grab these bitlocks > while they are held by the selftests. With GuC, for example, that is > not true because the hanging workloads may cause the GuC code to attempt > to grab

[PATCH] drm/i915/selftests: Use clear_and_wake_up_bit() for the per-engine reset bitlocks

Some selftests assume that nothing will attempt to grab these bitlocks while they are held by the selftests. With GuC, for example, that is not true because the hanging workloads may cause the GuC code to attempt to grab them for a global reset, and that may cause it to end up sleeping on the bit