Bluetooth: Fix kernel hci_dev_open timeout reset

Handle -EALREADY error in hci_sock of hci_dev_open as indication that
the HCI device is already open. This was causing reset inducing timeout,
and removed unused/useless check of failure in power-up code.

Signed-off-by: Brian Gix <bgix@codeaurora.org>
(cherry picked from commit 9bb9d38e700c8deb08f6347f43be250b9ec9e3be)

Change-Id: Id42c5acf37bb5657c898fb358bc2f45621ea5044
Signed-off-by: Oguri, Srivalli <oguri@codeaurora.org>

net/bluetooth/hci_sock.c

@@ -542,7 +542,12 @@ static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
 	case HCIDEVUP:
 		if (!capable(CAP_NET_ADMIN))
 			return -EPERM;
-		return hci_dev_open(arg);
+
+		err =  hci_dev_open(arg);
+		if (!err || err == -EALREADY)
+			return 0;
+		else
+			return err;
 
 	case HCIDEVDOWN:
 		if (!capable(CAP_NET_ADMIN))