Commit 56e449603f0a ("drm/sched: Convert the GPU scheduler to variable
number of run-queues") introduces drm_err() in drm_sched_job_init(), in
order to indicate that the given entity has no runq, however at this
time job->sched is not yet set, likely to be NULL initialized, and hence
shouldn't be used.
Replace the corresponding drm_err() call with pr_err() to avoid a
potential page fault.
While at it, extend the documentation of drm_sched_job_init() to
indicate that job->sched is not a valid pointer until
drm_sched_job_arm() has been called.
Fixes: 56e449603f0a ("drm/sched: Convert the GPU scheduler to variable number of run-queues")
Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
---
drivers/gpu/drm/scheduler/sched_main.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 27843e37d9b7..dd28389f0ddd 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -680,6 +680,9 @@ EXPORT_SYMBOL(drm_sched_resubmit_jobs);
* This function returns -ENOENT in this case (which probably should be -EIO as
* a more meanigful return value).
*
+ * Note that job->sched is not a valid pointer until drm_sched_job_arm() has
+ * been called.
+ *
* Returns 0 for success, negative error code otherwise.
*/
int drm_sched_job_init(struct drm_sched_job *job,
@@ -691,7 +694,7 @@ int drm_sched_job_init(struct drm_sched_job *job,
* or worse--a blank screen--leave a trail in the
* logs, so this can be debugged easier.
*/
- drm_err(job->sched, "%s: entity has no rq!\n", __func__);
+ pr_err("%s: entity has no rq!\n", __func__);
return -ENOENT;
}
base-commit: c015fb6d01adb616fb54824feb55ce5ab18e8ca1
--
2.41.0
