From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 4 Sep 2015 04:11:54 +0000 (-0400)
Subject: drm/amdgpu: fix warning in scheduler
X-Git-Tag: firefly_0821_release~176^2~1083^2~4^2~4
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5134e999cb72c621f48305d5c201ab30156505c1;p=firefly-linux-kernel-4.4.55.git

drm/amdgpu: fix warning in scheduler

This should never happen so warn when the count does
not equal the expected size.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index ab8577f8ed4a..9259f1b6664c 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -332,7 +332,7 @@ static int amd_sched_main(void *param)
 {
 	struct sched_param sparam = {.sched_priority = 1};
 	struct amd_gpu_scheduler *sched = (struct amd_gpu_scheduler *)param;
-	int r;
+	int r, count;
 
 	sched_setscheduler(current, SCHED_FIFO, &sparam);
 
@@ -361,7 +361,8 @@ static int amd_sched_main(void *param)
 			fence_put(fence);
 		}
 
-		kfifo_out(&entity->job_queue, &job, sizeof(job));
+		count = kfifo_out(&entity->job_queue, &job, sizeof(job));
+		WARN_ON(count != sizeof(job));
 		wake_up(&sched->job_scheduled);
 	}
 	return 0;