[PATCH v2] drm/imagination: avoid deadlock on fence release

[Matt Coster]

On Wed, 26 Feb 2025 15:42:19 +0000, Brendan King wrote:
> Do scheduler queue fence release processing on a workqueue, rather
> than in the release function itself.
> 
> Fixes deadlock issues such as the following:
> 
> [  607.400437] ============================================
> [  607.405755] WARNING: possible recursive locking detected
> [  607.415500] --------------------------------------------
> [  607.420817] weston:zfq0/24149 is trying to acquire lock:
> [  607.426131] ffff000017d041a0 (reservation_ww_class_mutex){+.+.}-{3:3}, at: pvr_gem_object_vunmap+0x40/0xc0 [powervr]
> [  607.436728]
>                but task is already holding lock:
> [  607.442554] ffff000017d105a0 (reservation_ww_class_mutex){+.+.}-{3:3}, at: dma_buf_ioctl+0x250/0x554
> [  607.451727]
>                other info that might help us debug this:
> [  607.458245]  Possible unsafe locking scenario:
> 
> [...]

Applied, thanks!

[1/1] drm/imagination: avoid deadlock on fence release
      commit: df1a1ed5e1bdd9cc13148e0e5549f5ebcf76cf13

Best regards,
-- 
Matt Coster <matt.coster at imgtec.com>