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authorChristoph Hellwig <hch@infradead.org>2011-12-18 20:00:13 +0000
committerBen Myers <bpm@sgi.com>2012-01-17 15:11:07 -0600
commit5bf1f26227a59b9634e95eb3c7c012b766e5e6a0 (patch)
tree940a58e03256bd70787d1341c90027ef334f5fac
parent2813d682e8e6a278f94817429afd46b30875bb6e (diff)
xfs: always return with the iolock held from xfs_file_aio_write_checks
While xfs_iunlock is fine with 0 lockflags the calling conventions are much cleaner if xfs_file_aio_write_checks never returns without the iolock held. Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
-rw-r--r--fs/xfs/xfs_file.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 63231392678..134ff2fe4f4 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -636,7 +636,9 @@ out_lock:
/*
* Common pre-write limit and setup checks.
*
- * Returns with iolock held according to @iolock.
+ * Called with the iolocked held either shared and exclusive according to
+ * @iolock, and returns with it held. Might upgrade the iolock to exclusive
+ * if called for a direct write beyond i_size.
*/
STATIC ssize_t
xfs_file_aio_write_checks(
@@ -653,8 +655,7 @@ xfs_file_aio_write_checks(
restart:
error = generic_write_checks(file, pos, count, S_ISBLK(inode->i_mode));
if (error) {
- xfs_rw_iunlock(ip, XFS_ILOCK_EXCL | *iolock);
- *iolock = 0;
+ xfs_rw_iunlock(ip, XFS_ILOCK_EXCL);
return error;
}