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authorJens Axboe <jaxboe@fusionio.com>2010-06-14 14:54:57 +0400
committerJens Axboe <jaxboe@fusionio.com>2010-06-14 14:54:57 +0400
commit575f552012ec0cd6591fd85ee996d5a5ad1a669a (patch)
tree86b9882f04e75e2fb1046f9c82f8c82c86810c80 /drivers/block
parent29cb48594b873f6193d6327097e504bd3e2314de (diff)
parentdc66c74de6f4238020db3e2041d4aca5c5b3e9bc (diff)
downloadlinux-575f552012ec0cd6591fd85ee996d5a5ad1a669a.tar.xz
Merge branch 'for-jens' of git://git.drbd.org/linux-2.6-drbd into for-linus
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/drbd/drbd_main.c2
-rw-r--r--drivers/block/drbd/drbd_nl.c6
2 files changed, 6 insertions, 2 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 6b077f93acc6..7258c95e895e 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1236,8 +1236,6 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
/* Last part of the attaching process ... */
if (ns.conn >= C_CONNECTED &&
os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) {
- kfree(mdev->p_uuid); /* We expect to receive up-to-date UUIDs soon. */
- mdev->p_uuid = NULL; /* ...to not use the old ones in the mean time */
drbd_send_sizes(mdev, 0, 0); /* to start sync... */
drbd_send_uuids(mdev);
drbd_send_state(mdev);
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 632e3245d1bb..2151f18b21de 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1114,6 +1114,12 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
mdev->new_state_tmp.i = ns.i;
ns.i = os.i;
ns.disk = D_NEGOTIATING;
+
+ /* We expect to receive up-to-date UUIDs soon.
+ To avoid a race in receive_state, free p_uuid while
+ holding req_lock. I.e. atomic with the state change */
+ kfree(mdev->p_uuid);
+ mdev->p_uuid = NULL;
}
rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);