---

yaml
---
r: 345854
b: refs/heads/master
c: 569083c
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: da4a75d2ef064501f6756986af6ea330ba0585d7
+refs/heads/master: 569083c08dc16c043b4bdd473d41ff85a2b2df9e

trunk/drivers/block/drbd/drbd_main.c

@@ -2124,7 +2124,9 @@ void drbd_delete_device(unsigned int minor)
 	if (!mdev)
 		return;
 
-	idr_remove(&mdev->tconn->volumes, minor);
+	idr_remove(&mdev->tconn->volumes, mdev->vnr);
+	idr_remove(&minors, minor);
+	synchronize_rcu();
 
 	/* paranoia asserts */
 	D_ASSERT(mdev->open_cnt == 0);
@@ -2153,7 +2155,6 @@ void drbd_delete_device(unsigned int minor)
 	 * allocated from drbd_new_device
 	 * and actually free the mdev itself */
 	drbd_free_mdev(mdev);
-	idr_remove(&minors, minor);
 }
 
 static void drbd_cleanup(void)
@@ -2331,15 +2332,6 @@ enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor,
 		return ERR_NOMEM;
 
 	mdev->tconn = tconn;
-	if (!idr_pre_get(&tconn->volumes, GFP_KERNEL))
-		goto out_no_idr;
-	if (idr_get_new(&tconn->volumes, mdev, &vnr_got))
-		goto out_no_idr;
-	if (vnr_got != vnr) {
-		dev_err(DEV, "vnr_got (%d) != vnr (%d)\n", vnr_got, vnr);
-		goto out_no_q;
-	}
-
 	mdev->minor = minor;
 
 	drbd_init_set_defaults(mdev);
@@ -2395,19 +2387,35 @@ enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor,
 	INIT_LIST_HEAD(&mdev->current_epoch->list);
 	mdev->epochs = 1;
 
+	if (!idr_pre_get(&tconn->volumes, GFP_KERNEL))
+		goto out_no_vol_idr;
+	if (idr_get_new(&tconn->volumes, mdev, &vnr_got))
+		goto out_no_vol_idr;
+	if (vnr_got != vnr) {
+		dev_err(DEV, "vnr_got (%d) != vnr (%d)\n", vnr_got, vnr);
+		goto out_idr_remove_vol;
+	}
+
 	if (!idr_pre_get(&minors, GFP_KERNEL))
-		goto out_no_minor_idr;
+		goto out_idr_remove_vol;
 	if (idr_get_new(&minors, mdev, &minor_got))
-		goto out_no_minor_idr;
+		goto out_idr_remove_vol;
 	if (minor_got != minor) {
-		idr_remove(&minors, minor_got);
-		goto out_no_minor_idr;
+		/* minor exists, or other idr strangeness? */
+		dev_err(DEV, "available minor (%d) != requested minor (%d)\n",
+				minor_got, minor);
+		goto out_idr_remove_minor;
 	}
 	add_disk(disk);
 
 	return NO_ERROR;
 
-out_no_minor_idr:
+out_idr_remove_minor:
+	idr_remove(&minors, minor_got);
+out_idr_remove_vol:
+	idr_remove(&tconn->volumes, vnr_got);
+	synchronize_rcu();
+out_no_vol_idr:
 	kfree(mdev->current_epoch);
 out_no_epoch:
 	drbd_bm_cleanup(mdev);
@@ -2418,8 +2426,6 @@ enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor,
 out_no_disk:
 	blk_cleanup_queue(q);
 out_no_q:
-	idr_remove(&tconn->volumes, vnr_got);
-out_no_idr:
 	kfree(mdev);
 	return ERR_NOMEM;
 }