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btrfs: check return value of btrfs_start_ioctl_transaction() properly 

btrfs_start_ioctl_transaction() returns ERR_PTR(), not NULL.
So, it is necessary to use IS_ERR() to check the return value.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Tsutomu Itoh 2011-01-24 00:57:10 +00:00 committed by Chris Mason
parent 3612b49598
commit abd30bb0af
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/ioctl.c
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@ -2085,7 +2085,7 @@ static long btrfs_ioctl_trans_start(struct file *file)
ret = -ENOMEM; ret = -ENOMEM;
trans = btrfs_start_ioctl_transaction(root, 0); trans = btrfs_start_ioctl_transaction(root, 0);
if (!trans) if (IS_ERR(trans))
goto out_drop; goto out_drop;
file->private_data = trans; file->private_data = trans;