linux-kernel - [PATCH 3/6] drivers/media/media-devnode: clear private_data before put

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Date:	Mon, 21 Mar 2016 14:30:28 +0100
From:	Max Kellermann <max@...mpel.org>
To:	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: [PATCH 3/6] drivers/media/media-devnode: clear private_data before
 put_device()

Callbacks invoked from put_device() may free the struct media_devnode
pointer, so any cleanup needs to be done before put_device().

Signed-off-by: Max Kellermann <max@...mpel.org>
---
 drivers/media/media-devnode.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/media-devnode.c b/drivers/media/media-devnode.c
index 4d7e8dd..e263816 100644
--- a/drivers/media/media-devnode.c
+++ b/drivers/media/media-devnode.c
@@ -196,10 +196,11 @@ static int media_release(struct inode *inode, struct file *filp)
 	if (mdev->fops->release)
 		mdev->fops->release(filp);
 
+	filp->private_data = NULL;
+
 	/* decrease the refcount unconditionally since the release()
 	   return value is ignored. */
 	put_device(&mdev->dev);
-	filp->private_data = NULL;
 	return 0;
 }