linux-kernel - [PATCH 3.12 106/175] btrfs: fix lost return value due to variable shadowing

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Message-Id: <3caad0eda3f36aadd1be4655d431814d2c0b21f7.1426581621.git.jslaby@suse.cz>
Date:	Tue, 17 Mar 2015 09:41:24 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, David Sterba <dsterba@...e.cz>,
	Chris Mason <clm@...com>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 106/175] btrfs: fix lost return value due to variable shadowing

From: David Sterba <dsterba@...e.cz>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 1932b7be973b554ffe20a5bba6ffaed6fa995cdc upstream.

A block-local variable stores error code but btrfs_get_blocks_direct may
not return it in the end as there's a ret defined in the function scope.

Fixes: d187663ef24c ("Btrfs: lock extents as we map them in DIO")
Signed-off-by: David Sterba <dsterba@...e.cz>
Signed-off-by: Chris Mason <clm@...com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 fs/btrfs/inode.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 68f7a1ff104a..904ed6d7e4bb 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6703,7 +6703,6 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
 	    ((BTRFS_I(inode)->flags & BTRFS_INODE_NODATACOW) &&
 	     em->block_start != EXTENT_MAP_HOLE)) {
 		int type;
-		int ret;
 		u64 block_start, orig_start, orig_block_len, ram_bytes;
 
 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
-- 
2.3.0

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