From: Philipp Reisner Date: Mon, 28 Dec 2009 15:58:38 +0000 (+0100) Subject: drbd: Fix for a race between IO and a detach operation [Bugz 262] X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0a6dbf2bc4ea3781c530f895e2d92fd3c4a735a2;p=deliverable%2Flinux.git drbd: Fix for a race between IO and a detach operation [Bugz 262] In D_DISKLESS we do not hand out any new references to ldev (local_cnt) therefore waiting until all previously handed out refereces got returned is sufficient before actually freeing mdev->ldev. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 9348f33f6242..e898ad9eb1c3 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1298,6 +1298,7 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, dev_err(DEV, "Sending state in drbd_io_error() failed\n"); } + wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); lc_destroy(mdev->resync); mdev->resync = NULL; lc_destroy(mdev->act_log);