[Bluetooth] Use wait_event_interruptible_timeout()

Use wait_event_interruptible_timeout() instead of custom wait
queue code.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/cmtp/capi.c

@@ -35,6 +35,7 @@
 #include <linux/socket.h>
 #include <linux/ioctl.h>
 #include <linux/file.h>
+#include <linux/wait.h>
 #include <net/sock.h>
 
 #include <linux/isdn/capilli.h>
@@ -440,10 +441,8 @@ static void cmtp_register_appl(struct capi_ctr *ctrl, __u16 appl, capi_register_
 
 static void cmtp_release_appl(struct capi_ctr *ctrl, __u16 appl)
 {
-	DECLARE_WAITQUEUE(wait, current);
 	struct cmtp_session *session = ctrl->driverdata;
 	struct cmtp_application *application;
-	unsigned long timeo = CMTP_INTEROP_TIMEOUT;
 
 	BT_DBG("ctrl %p appl %d", ctrl, appl);
 
@@ -458,20 +457,8 @@ static void cmtp_release_appl(struct capi_ctr *ctrl, __u16 appl)
 	cmtp_send_interopmsg(session, CAPI_REQ, application->mapping, application->msgnum,
 				CAPI_FUNCTION_RELEASE, NULL, 0);
 
-	add_wait_queue(&session->wait, &wait);
-	while (timeo) {
-		set_current_state(TASK_INTERRUPTIBLE);
-
-		if (application->state == BT_CLOSED)
-			break;
-
-		if (signal_pending(current))
-			break;
-
-		timeo = schedule_timeout(timeo);
-	}
-	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&session->wait, &wait);
+	wait_event_interruptible_timeout(session->wait,
+			(application->state == BT_CLOSED), CMTP_INTEROP_TIMEOUT);
 
 	cmtp_application_del(session, application);
 }
@@ -541,9 +528,8 @@ static int cmtp_ctr_read_proc(char *page, char **start, off_t off, int count, in
 
 int cmtp_attach_device(struct cmtp_session *session)
 {
-	DECLARE_WAITQUEUE(wait, current);
-	unsigned long timeo = CMTP_INTEROP_TIMEOUT;
 	unsigned char buf[4];
+	long ret;
 
 	BT_DBG("session %p", session);
 
@@ -552,30 +538,17 @@ int cmtp_attach_device(struct cmtp_session *session)
 	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, CMTP_INITIAL_MSGNUM,
 				CAPI_FUNCTION_GET_PROFILE, buf, 4);
 
-	add_wait_queue(&session->wait, &wait);
-	while (timeo) {
-		set_current_state(TASK_INTERRUPTIBLE);
-
-		if (session->ncontroller)
-			break;
-
-		if (signal_pending(current))
-			break;
-
-		timeo = schedule_timeout(timeo);
-	}
-	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&session->wait, &wait);
-
+	ret = wait_event_interruptible_timeout(session->wait,
+			session->ncontroller, CMTP_INTEROP_TIMEOUT);
+	
 	BT_INFO("Found %d CAPI controller(s) on device %s", session->ncontroller, session->name);
 
-	if (!timeo)
+	if (!ret)
 		return -ETIMEDOUT;
 
 	if (!session->ncontroller)
 		return -ENODEV;
 
-
 	if (session->ncontroller > 1)
 		BT_INFO("Setting up only CAPI controller 1");