[PATCH v4 1/6] drm/amdkfd: avoid NULL kfd_process_device in kfd_profiler_pmc

[Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>]

All other callers of kfd_process_device_data_by_id deal with
a possible NULL return value except kfd_profiler_pmc.

Check it after the mutex unlock and return -EINVAL as others
place do.

Reported-by: Sashiko-bot <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20261029152000.22001-1-pierre-eric.pelloux-prayer@amd.com?part=4
Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 6c710e4a5220..ad086240a6dd 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -3463,8 +3463,10 @@ static inline int kfd_profiler_pmc(struct kfd_process *p,
 	/* Enable/disable perfcount if requested */
 	mutex_lock(&p->mutex);
 	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
-	dqm = pdd->dev->dqm;
 	mutex_unlock(&p->mutex);
+	if (!pdd)
+		return -EINVAL;
+	dqm = pdd->dev->dqm;
 
 	dqm->ops.set_perfcount(dqm, args->perfcount_enable);
 	return status;
-- 
2.43.0