diff --git a/[refs] b/[refs]
index 21bacc0a4ec0..5fd4c42d5da8 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 99432fcc528d7a5ac8494a4c07ad4726670c96e2
+refs/heads/master: 9a0d9d0389ef769e4b01abf50fcc11407706270b
diff --git a/trunk/drivers/block/drbd/drbd_int.h b/trunk/drivers/block/drbd/drbd_int.h
index 8aa10391115b..a74d3ee04ba8 100644
--- a/trunk/drivers/block/drbd/drbd_int.h
+++ b/trunk/drivers/block/drbd/drbd_int.h
@@ -2157,6 +2157,10 @@ static inline int get_net_conf(struct drbd_conf *mdev)
 static inline void put_ldev(struct drbd_conf *mdev)
 {
 	int i = atomic_dec_return(&mdev->local_cnt);
+
+	/* This may be called from some endio handler,
+	 * so we must not sleep here. */
+
 	__release(local);
 	D_ASSERT(i >= 0);
 	if (i == 0) {
diff --git a/trunk/drivers/block/drbd/drbd_nl.c b/trunk/drivers/block/drbd/drbd_nl.c
index 7c64ec042124..13569635b922 100644
--- a/trunk/drivers/block/drbd/drbd_nl.c
+++ b/trunk/drivers/block/drbd/drbd_nl.c
@@ -1334,11 +1334,19 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
 static int drbd_nl_detach(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
 			  struct drbd_nl_cfg_reply *reply)
 {
+	enum drbd_ret_code retcode;
+	int ret;
 	drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */
-	reply->ret_code = drbd_request_state(mdev, NS(disk, D_DISKLESS));
-	if (mdev->state.disk == D_DISKLESS)
-		wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt));
+	retcode = drbd_request_state(mdev, NS(disk, D_FAILED));
+	/* D_FAILED will transition to DISKLESS. */
+	ret = wait_event_interruptible(mdev->misc_wait,
+			mdev->state.disk != D_FAILED);
 	drbd_resume_io(mdev);
+	if (retcode == SS_IS_DISKLESS)
+		retcode = SS_NOTHING_TO_DO;
+	if (ret)
+		retcode = ERR_INTR;
+	reply->ret_code = retcode;
 	return 0;
 }
 
diff --git a/trunk/include/linux/drbd.h b/trunk/include/linux/drbd.h
index cec467f5d676..c86283b4fbab 100644
--- a/trunk/include/linux/drbd.h
+++ b/trunk/include/linux/drbd.h
@@ -53,7 +53,7 @@
 
 
 extern const char *drbd_buildtag(void);
-#define REL_VERSION "8.3.10"
+#define REL_VERSION "8.3.11"
 #define API_VERSION 88
 #define PRO_VERSION_MIN 86
 #define PRO_VERSION_MAX 96