From 05447420f99c1c44063c7f00054667c022cc1365 Mon Sep 17 00:00:00 2001 From: Kiyoshi Ueda Date: Wed, 8 Sep 2010 18:07:01 +0200 Subject: dm: fix locking context in queue_io() Now queue_io() is called from dec_pending(), which may be called with interrupts disabled, so queue_io() must not enable interrupts unconditionally and must save/restore the current interrupts status. Signed-off-by: Kiyoshi Ueda Signed-off-by: Jun'ichi Nomura Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe --- drivers/md/dm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/md') diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 2011704b8ba0..cd2f7e77b625 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -512,9 +512,11 @@ static void end_io_acct(struct dm_io *io) */ static void queue_io(struct mapped_device *md, struct bio *bio) { - spin_lock_irq(&md->deferred_lock); + unsigned long flags; + + spin_lock_irqsave(&md->deferred_lock, flags); bio_list_add(&md->deferred, bio); - spin_unlock_irq(&md->deferred_lock); + spin_unlock_irqrestore(&md->deferred_lock, flags); queue_work(md->wq, &md->work); } -- cgit v1.2.1