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| author | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2022-11-23 03:13:03 +0300 |
|---|---|---|
| committer | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2023-01-03 14:49:59 +0300 |
| commit | 69555549cfa42e10f2fdd2699ed4e34d9d4f392b (patch) | |
| tree | 78ff141b0cf4f63f99b210054139a90f8bd8124f /drivers/cxl/pmem.c | |
| parent | 2c55d703391acf7e9101da596d0c15ee03b318a3 (diff) | |
| download | linux-69555549cfa42e10f2fdd2699ed4e34d9d4f392b.tar.bz2 | |
drm/scheduler: Fix lockup in drm_sched_entity_kill()
The drm_sched_entity_kill() is invoked twice by drm_sched_entity_destroy()
while userspace process is exiting or being killed. First time it's invoked
when sched entity is flushed and second time when entity is released. This
causes a lockup within wait_for_completion(entity_idle) due to how completion
API works.
Calling wait_for_completion() more times than complete() was invoked is a
error condition that causes lockup because completion internally uses
counter for complete/wait calls. The complete_all() must be used instead
in such cases.
This patch fixes lockup of Panfrost driver that is reproducible by killing
any application in a middle of 3d drawing operation.
Fixes: 2fdb8a8f07c2 ("drm/scheduler: rework entity flush, kill and fini")
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck
Link: https://patchwork.freedesktop.org/patch/msgid/20221123001303.533968-1-dmitry.osipenko@collabora.com
Diffstat (limited to 'drivers/cxl/pmem.c')
0 files changed, 0 insertions, 0 deletions