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drbd: Fix for a race between IO and a detach operation [Bugz 262]

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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 <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner
2009-12-28 16:58:38 +01:00
parent 0798219f61
commit 0a6dbf2bc4
1 changed files with 1 additions and 0 deletions
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drivers/block/drbd/drbd_main.c
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@@ -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"); 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); lc_destroy(mdev->resync);
mdev->resync = NULL; mdev->resync = NULL;
lc_destroy(mdev->act_log); lc_destroy(mdev->act_log);