Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-upstream

1 files changed, 13 insertions, 0 deletions

diff --git a/fs/direct-io.c b/fs/direct-io.c
index af0558dbe8b7..b6d43908ff7a 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1209,6 +1209,19 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
         retval = direct_io_worker(rw, iocb, inode, iov, offset,
                                 nr_segs, blkbits, get_block, end_io, dio);
 
+        /*
+         * In case of error extending write may have instantiated a few
+         * blocks outside i_size. Trim these off again for DIO_LOCKING.
+         * NOTE: DIO_NO_LOCK/DIO_OWN_LOCK callers have to handle this by
+         * it's own meaner.
+         */
+        if (unlikely(retval < 0 && (rw & WRITE))) {
+                loff_t isize = i_size_read(inode);
+
+                if (end > isize && dio_lock_type == DIO_LOCKING)
+                        vmtruncate(inode, isize);
+        }
+
         if (rw == READ && dio_lock_type == DIO_LOCKING)
                 release_i_mutex = 0;