linux-kernel - [PATCH] drm/amdgpu: remove useless condition in amdgpu_job_stop_all_jobs_on

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Date:   Tue, 19 Jul 2022 13:39:54 +0300
From:   Andrey Strachuk <strochuk@...ras.ru>
To:     Alex Deucher <alexander.deucher@....com>
Cc:     Andrey Strachuk <strochuk@...ras.ru>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Andrey Grodzovsky <andrey.grodzovsky@....com>,
        Emma Anholt <emma@...olt.net>, Melissa Wen <mwen@...lia.com>,
        Guchun Chen <guchun.chen@....com>,
        Surbhi Kakarya <surbhi.kakarya@....com>,
        Jack Zhang <Jack.Zhang1@....com>,
        Hawking Zhang <Hawking.Zhang@....com>,
        Felix Kuehling <Felix.Kuehling@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: [PATCH] drm/amdgpu: remove useless condition in amdgpu_job_stop_all_jobs_on_sched()

Local variable 'rq' is initialized by an address
of field of drm_sched_job, so it does not make
sense to compare 'rq' with NULL.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Andrey Strachuk <strochuk@...ras.ru>
Fixes: 7c6e68c777f1 ("drm/amdgpu: Avoid HW GPU reset for RAS.")
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 67f66f2f1809..600401f2a98f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -285,10 +285,6 @@ void amdgpu_job_stop_all_jobs_on_sched(struct drm_gpu_scheduler *sched)
 	/* Signal all jobs not yet scheduled */
 	for (i = DRM_SCHED_PRIORITY_COUNT - 1; i >= DRM_SCHED_PRIORITY_MIN; i--) {
 		struct drm_sched_rq *rq = &sched->sched_rq[i];
-
-		if (!rq)
-			continue;
-
 		spin_lock(&rq->lock);
 		list_for_each_entry(s_entity, &rq->entities, list) {
 			while ((s_job = to_drm_sched_job(spsc_queue_pop(&s_entity->job_queue)))) {
-- 
2.25.1