From: Christian König <christian.koenig@amd.com>
Date: Mon, 24 Aug 2015 12:29:40 +0000 (+0200)
Subject: drm/amdgpu: wake up scheduler only when neccessary
X-Git-Tag: v4.3-rc1~75^2~14^2~2
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=88079006dc412c5d1676f9f6e9c4d72a209eb556;p=linux.git

drm/amdgpu: wake up scheduler only when neccessary

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
---

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index ca22d9032477..414536557673 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -27,6 +27,8 @@
 #include <drm/drmP.h>
 #include "gpu_scheduler.h"
 
+static void amd_sched_wakeup(struct amd_gpu_scheduler *sched);
+
 /* Initialize a given run queue struct */
 static void amd_sched_rq_init(struct amd_sched_rq *rq)
 {
@@ -209,7 +211,7 @@ static bool amd_sched_entity_in(struct amd_sched_job *job)
 
 	/* first job wakes up scheduler */
 	if (first)
-		wake_up_interruptible(&job->sched->wait_queue);
+		amd_sched_wakeup(job->sched);
 
 	return added;
 }
@@ -249,6 +251,15 @@ static bool amd_sched_ready(struct amd_gpu_scheduler *sched)
 		sched->hw_submission_limit;
 }
 
+/**
+ * Wake up the scheduler when it is ready
+ */
+static void amd_sched_wakeup(struct amd_gpu_scheduler *sched)
+{
+	if (amd_sched_ready(sched))
+		wake_up_interruptible(&sched->wait_queue);
+}
+
 /**
  * Select next entity containing real IB submissions
 */