]> www.infradead.org Git - linux.git/commit
drm/xe/xe_guc_submit: Fix exec queue stop race condition
authorJonathan Cavitt <jonathan.cavitt@intel.com>
Fri, 10 May 2024 19:45:38 +0000 (12:45 -0700)
committerMatthew Brost <matthew.brost@intel.com>
Tue, 14 May 2024 23:28:51 +0000 (16:28 -0700)
commit1564d411e17f51e2f64655b4e4da015be1ba7eaa
tree2fcba860b90fb4542fc13b3581c5b6b86b423df3
parent4071e0872fcad846381f86f5164236827f7e91c8
drm/xe/xe_guc_submit: Fix exec queue stop race condition

Reorder the xe_sched_tdr_queue_imm and set_exec_queue_banned calls in
guc_exec_queue_stop.  This prevents a possible race condition between
the two events in which it's possible for xe_sched_tdr_queue_imm to
wake the ufence waiter before the exec queue is banned, causing the
ufence waiter to miss the banned state.

Suggested-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240510194540.3246991-1-jonathan.cavitt@intel.com
drivers/gpu/drm/xe/xe_guc_submit.c