From: algea.cao <algea.cao@rock-chips.com>
Date: Tue, 11 Apr 2017 07:36:50 +0000 (+0800)
Subject: drm/sysfs: fix up memory leak problem
X-Git-Tag: firefly_0821_release~44
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=firefly-linux-kernel-4.4.55.git;a=commitdiff_plain;h=d7679438f04d0712257e6f4f65faaddff92b6990

drm/sysfs: fix up memory leak problem

Change-Id: I2b4617412b0d5b2897c3cce2ef612a11a9762ba2
Signed-off-by: algea.cao <algea.cao@rock-chips.com>
---

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index ea5aebf02319..3567aaf89995 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -271,11 +271,11 @@ static int drm_get_audio_format(struct edid *edid,
 			       char *audioformat, int len)
 {
 	int i, size = 0, num = 0;
-	struct cea_sad *sads;
+	struct cea_sad *sads = NULL;
 
 	memset(audioformat, 0, len);
 	num = drm_edid_to_sad(edid, &sads);
-	if (!num)
+	if (num <= 0)
 		return 0;
 
 	for (i = 0; i < num; i++) {
@@ -288,6 +288,8 @@ static int drm_get_audio_format(struct edid *edid,
 		audioformat[size] = ',';
 		audioformat += (size + 1);
 	}
+	kfree(sads);
+
 	return num;
 }