[PATCH] ext3 direct io assert fix

Fix bug identified by Badari Pulavarty <pbadari@us.ibm.com>

Local variable `handle' will become stale if ext3_direct_io_get_blocks()
closes off the current transaction and starts a new one.  This causes a BUG in
journal_stop().

So reacquire the handle from *current after performing the I/O.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/ext3/inode.c

@@ -1579,6 +1579,12 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
 				 offset, nr_segs,
 				 ext3_direct_io_get_blocks, NULL);
 
+	/*
+	 * Reacquire the handle: ext3_direct_io_get_block() can restart the
+	 * transaction
+	 */
+	handle = journal_current_handle();
+
 out_stop:
 	if (handle) {
 		int err;