From: cym <cym@rock-chips.com>
Date: Tue, 17 Sep 2013 06:18:07 +0000 (+0800)
Subject: RK31/RK30:add vfree(buf); to fix memory leaks in video_state_write();
X-Git-Tag: firefly_0821_release~6622
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=db38a404c20a08ed998562da775ff169a03758c8;p=firefly-linux-kernel-4.4.55.git

RK31/RK30:add vfree(buf); to fix memory leaks in video_state_write();
---

diff --git a/arch/arm/plat-rk/ddr_freq.c b/arch/arm/plat-rk/ddr_freq.c
index 5ec16e38b7ef..52d01020dca0 100755
--- a/arch/arm/plat-rk/ddr_freq.c
+++ b/arch/arm/plat-rk/ddr_freq.c
@@ -302,8 +302,10 @@ static ssize_t video_state_write(struct file *file, const char __user *buffer,
 	cookie_pot = buf;
 
 	if (count < 1)
+		vfree(buf);
 		return count;
 	if (copy_from_user(cookie_pot, buffer, count)) {
+		vfree(buf);
 		return -EFAULT;
 	}
 
@@ -349,10 +351,12 @@ static ssize_t video_state_write(struct file *file, const char __user *buffer,
 		}
 		break;
 	default:
+		vfree(buf);
 		return -EINVAL;
 
 	}
 	ddr.video_state = state;
+	vfree(buf);
 	return count;
 }