linux-kernel - [PATCH] bdev: fix ->bd_part

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Date:	Thu, 02 Nov 2006 11:48:05 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Cc:	Neil Brown <neilb@...e.de>
Subject: [PATCH] bdev: fix ->bd_part_count leak


Don't leak a ->bd_part_count when the partition open fails with -ENXIO.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
---
 fs/block_dev.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6-mm/fs/block_dev.c
===================================================================
--- linux-2.6-mm.orig/fs/block_dev.c
+++ linux-2.6-mm/fs/block_dev.c
@@ -907,6 +907,7 @@ EXPORT_SYMBOL(bd_set_size);
 
 static int __blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags,
 			int for_part);
+static int __blkdev_put(struct block_device *bdev, int for_part);
 
 static int do_open(struct block_device *bdev, struct file *file, int for_part)
 {
@@ -992,7 +993,7 @@ out_first:
 	bdev->bd_disk = NULL;
 	bdev->bd_inode->i_data.backing_dev_info = &default_backing_dev_info;
 	if (bdev != bdev->bd_contains)
-		blkdev_put(bdev->bd_contains);
+		__blkdev_put(bdev->bd_contains, 1);
 	bdev->bd_contains = NULL;
 	put_disk(disk);
 	module_put(owner);


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