From: Rob Clark <robdclark@gmail.com>
Date: Sat, 28 Jun 2014 15:11:34 +0000 (-0400)
Subject: drm/msm: fix double struct_mutex acquire
X-Git-Tag: firefly_0821_release~176^2~3450^2~18^2~13
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b544021f18931258e4e1ef8d88d43dedb73a7ecf;p=firefly-linux-kernel-4.4.55.git

drm/msm: fix double struct_mutex acquire

Mutex is already grabbed in show_locked().. somehow this slipped
through.

Signed-off-by: Rob Clark <robdclark@gmail.com>
---

diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
index 942e09d898a8..a2cee0645336 100644
--- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
@@ -392,13 +392,10 @@ static const unsigned int a3xx_registers[] = {
 #ifdef CONFIG_DEBUG_FS
 static void a3xx_show(struct msm_gpu *gpu, struct seq_file *m)
 {
-	struct drm_device *dev = gpu->dev;
 	int i;
 
 	adreno_show(gpu, m);
 
-	mutex_lock(&dev->struct_mutex);
-
 	gpu->funcs->pm_resume(gpu);
 
 	seq_printf(m, "status:   %08x\n",
@@ -418,8 +415,6 @@ static void a3xx_show(struct msm_gpu *gpu, struct seq_file *m)
 	}
 
 	gpu->funcs->pm_suspend(gpu);
-
-	mutex_unlock(&dev->struct_mutex);
 }
 #endif