Commit 3601ba27 authored Oct 18, 2010 by Artem Bityutskiy

UBIFS: do not forget to cancel timers



This is a bug-fix: when we unmount, and we are currently in R/O
mode because of an error - we do not sync write-buffers, which
means we also do not cancel write-buffer timers we may possibly
have armed. This patch fixes the issue.

The issue can easily be reproduced by enabling UBIFS failure debug
mode (echo 4 > /sys/module/ubifs/parameters/debug_tsts) and
unmounting as soon as a failure happen. At some point the system
oopses because we have an armed hrtimer but UBIFS is unmounted
already.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

parent 39037559

fs/ubifs/super.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1772,6 +1772,10 @@ static void ubifs_put_super(struct super_block *sb)
		*/
		ubifs_err("failed to write master node, "
		"error %d", err);
		} else {
		for (i = 0; i < c->jhead_cnt; i++)
		/* Make sure write-buffer timers are canceled */
		hrtimer_cancel(&c->jheads[i].wbuf.timer);
		}
		}