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drm/scheduler: Don't kill jobs in interrupt context 

commit 9b04369b06 upstream.

Interrupt context can't sleep. Drivers like Panfrost and MSM are taking
mutex when job is released, and thus, that code can sleep. This results
into "BUG: scheduling while atomic" if locks are contented while job is
freed. There is no good reason for releasing scheduler's jobs in IRQ
context, hence use normal context to fix the trouble.

Cc: stable@vger.kernel.org
Fixes: 542cff7893 ("drm/sched: Avoid lockdep spalt on killing a processes")
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220411221536.283312-1-dmitry.osipenko@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Osipenko 2022-04-12 01:15:36 +03:00 committed by Greg Kroah-Hartman
parent c25a91cb26
commit 309049a3a4
2 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/scheduler/sched_entity.c
View File

@ -190,7 +190,7 @@ long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)
}
EXPORT_SYMBOL(drm_sched_entity_flush);
static void drm_sched_entity_kill_jobs_irq_work(struct irq_work *wrk)
static void drm_sched_entity_kill_jobs_work(struct work_struct *wrk)
{
struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
@ -207,8 +207,8 @@ static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
finish_cb);
init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
irq_work_queue(&job->work);
INIT_WORK(&job->work, drm_sched_entity_kill_jobs_work);
schedule_work(&job->work);
}
static struct dma_fence *

4
include/drm/gpu_scheduler.h
View File

@ -28,7 +28,7 @@
#include <linux/dma-fence.h>
#include <linux/completion.h>
#include <linux/xarray.h>
#include <linux/irq_work.h>
#include <linux/workqueue.h>
#define MAX_WAIT_SCHED_ENTITY_Q_EMPTY msecs_to_jiffies(1000)
@ -294,7 +294,7 @@ struct drm_sched_job {
*/
union {
struct dma_fence_cb finish_cb;
struct irq_work work;
struct work_struct work;
};
uint64_t id;