diff --git a/drivers/bluetooth/btmrvl_debugfs.c b/drivers/bluetooth/btmrvl_debugfs.c
index fd6305bf953e4084c9b7557a26acb002deb101fe..8ecf4c6c28740243979920dd98ea7bdc638e5172 100644
--- a/drivers/bluetooth/btmrvl_debugfs.c
+++ b/drivers/bluetooth/btmrvl_debugfs.c
@@ -64,6 +64,8 @@ static ssize_t btmrvl_hscfgcmd_write(struct file *file,
 		return -EFAULT;
 
 	ret = strict_strtol(buf, 10, &result);
+	if (ret)
+		return ret;
 
 	priv->btmrvl_dev.hscfgcmd = result;
 
@@ -108,6 +110,8 @@ static ssize_t btmrvl_psmode_write(struct file *file, const char __user *ubuf,
 		return -EFAULT;
 
 	ret = strict_strtol(buf, 10, &result);
+	if (ret)
+		return ret;
 
 	priv->btmrvl_dev.psmode = result;
 
@@ -147,6 +151,8 @@ static ssize_t btmrvl_pscmd_write(struct file *file, const char __user *ubuf,
 		return -EFAULT;
 
 	ret = strict_strtol(buf, 10, &result);
+	if (ret)
+		return ret;
 
 	priv->btmrvl_dev.pscmd = result;
 
@@ -191,6 +197,8 @@ static ssize_t btmrvl_gpiogap_write(struct file *file, const char __user *ubuf,
 		return -EFAULT;
 
 	ret = strict_strtol(buf, 16, &result);
+	if (ret)
+		return ret;
 
 	priv->btmrvl_dev.gpio_gap = result;
 
@@ -230,6 +238,8 @@ static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
 		return -EFAULT;
 
 	ret = strict_strtol(buf, 10, &result);
+	if (ret)
+		return ret;
 
 	priv->btmrvl_dev.hscmd = result;
 	if (priv->btmrvl_dev.hscmd) {
@@ -272,6 +282,8 @@ static ssize_t btmrvl_hsmode_write(struct file *file, const char __user *ubuf,
 		return -EFAULT;
 
 	ret = strict_strtol(buf, 10, &result);
+	if (ret)
+		return ret;
 
 	priv->btmrvl_dev.hsmode = result;
 
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index f13ddbf858ba4e90dd92b891d1b13d3fece1d496..77930aa522e3456231d6482f0683d60598771937 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -477,14 +477,16 @@ static void hci_setup_event_mask(struct hci_dev *hdev)
 	 * command otherwise */
 	u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
 
-	/* Events for 1.2 and newer controllers */
-	if (hdev->lmp_ver > 1) {
-		events[4] |= 0x01; /* Flow Specification Complete */
-		events[4] |= 0x02; /* Inquiry Result with RSSI */
-		events[4] |= 0x04; /* Read Remote Extended Features Complete */
-		events[5] |= 0x08; /* Synchronous Connection Complete */
-		events[5] |= 0x10; /* Synchronous Connection Changed */
-	}
+	/* CSR 1.1 dongles does not accept any bitfield so don't try to set
+	 * any event mask for pre 1.2 devices */
+	if (hdev->lmp_ver <= 1)
+		return;
+
+	events[4] |= 0x01; /* Flow Specification Complete */
+	events[4] |= 0x02; /* Inquiry Result with RSSI */
+	events[4] |= 0x04; /* Read Remote Extended Features Complete */
+	events[5] |= 0x08; /* Synchronous Connection Complete */
+	events[5] |= 0x10; /* Synchronous Connection Changed */
 
 	if (hdev->features[3] & LMP_RSSI_INQ)
 		events[4] |= 0x04; /* Inquiry Result with RSSI */
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 18dc9888d8c28064f9a32bd129c7a23d6711af04..8248303f44e892f66ba5af8841f094696e88f8cd 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -413,6 +413,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us
 			break;
 		}
 
+		memset(&cinfo, 0, sizeof(cinfo));
 		cinfo.hci_handle = chan->conn->hcon->handle;
 		memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3);
 
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 386cfaffd4b7569e919c933f89192eeb30cf14e2..1b10727ce523e077c1f571910275e085b6ee32f6 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -788,6 +788,7 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u
 
 		l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk;
 
+		memset(&cinfo, 0, sizeof(cinfo));
 		cinfo.hci_handle = conn->hcon->handle;
 		memcpy(cinfo.dev_class, conn->hcon->dev_class, 3);
 
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 42fdffd1d76c0c17c5ab3382b94ea5bf4fcc62c9..cb4fb7837e5c381736b257cf77917ac6992df3b7 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -369,6 +369,15 @@ static void __sco_sock_close(struct sock *sk)
 
 	case BT_CONNECTED:
 	case BT_CONFIG:
+		if (sco_pi(sk)->conn) {
+			sk->sk_state = BT_DISCONN;
+			sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
+			hci_conn_put(sco_pi(sk)->conn->hcon);
+			sco_pi(sk)->conn->hcon = NULL;
+		} else
+			sco_chan_del(sk, ECONNRESET);
+		break;
+
 	case BT_CONNECT:
 	case BT_DISCONN:
 		sco_chan_del(sk, ECONNRESET);
@@ -819,7 +828,9 @@ static void sco_chan_del(struct sock *sk, int err)
 		conn->sk = NULL;
 		sco_pi(sk)->conn = NULL;
 		sco_conn_unlock(conn);
-		hci_conn_put(conn->hcon);
+
+		if (conn->hcon)
+			hci_conn_put(conn->hcon);
 	}
 
 	sk->sk_state = BT_CLOSED;