From: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Date: Mon, 13 Jan 2014 15:41:22 +0000 (+0100)
Subject: usb: gadget: FunctionFS: dereference ffs_dev conditionally
X-Git-Tag: submit/tizen/20141121.110247~2687
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f6c0e5db47d7c39682ca27ea65da94fcb2537ddb;p=platform%2Fkernel%2Flinux-3.10.git

usb: gadget: FunctionFS: dereference ffs_dev conditionally

ffs_dev->ffs_release_dev_callback should be accessed only if ffs_dev
is not NULL.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
---

diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index b70b9be..1f8629a 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -2592,11 +2592,12 @@ static void ffs_release_dev(struct ffs_data *ffs_data)
 	ffs_dev_lock();
 
 	ffs_dev = ffs_data->private_data;
-	if (ffs_dev)
+	if (ffs_dev) {
 		ffs_dev->mounted = false;
-	
-	if (ffs_dev->ffs_release_dev_callback)
-		ffs_dev->ffs_release_dev_callback(ffs_dev);
+
+		if (ffs_dev->ffs_release_dev_callback)
+			ffs_dev->ffs_release_dev_callback(ffs_dev);
+	}
 
 	ffs_dev_unlock();
 }