mei: replace check for connection instead of transitioning

The function mei_cl_is_transitioning is just opposite
of mei_cl_is_connected. What we actually wanted to
check is if we lost connection so we can discard
the check for transition and check for 'not connected'

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/bus.c

@@ -302,7 +302,7 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
 
 		if (wait_event_interruptible(cl->rx_wait,
 				(!list_empty(&cl->rd_completed)) ||
-				mei_cl_is_transitioning(cl))) {
+				(!mei_cl_is_connected(cl)))) {
 
 			if (signal_pending(current))
 				return -EINTR;
@@ -311,7 +311,7 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
 
 		mutex_lock(&dev->device_lock);
 
-		if (mei_cl_is_transitioning(cl)) {
+		if (!mei_cl_is_connected(cl)) {
 			rets = -EBUSY;
 			goto out;
 		}

drivers/misc/mei/client.h

@@ -90,16 +90,18 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl);
 /*
  *  MEI input output function prototype
  */
+
+/**
+ * mei_cl_is_connected - host client is connected
+ *
+ * @cl: host clinet
+ *
+ * Return: true if the host clinet is connected
+ */
 static inline bool mei_cl_is_connected(struct mei_cl *cl)
 {
 	return  cl->state == MEI_FILE_CONNECTED;
 }
-static inline bool mei_cl_is_transitioning(struct mei_cl *cl)
-{
-	return  MEI_FILE_INITIALIZING == cl->state ||
-		MEI_FILE_DISCONNECTED == cl->state ||
-		MEI_FILE_DISCONNECTING == cl->state;
-}
 
 bool mei_cl_is_other_connecting(struct mei_cl *cl);
 int mei_cl_disconnect(struct mei_cl *cl);

drivers/misc/mei/main.c

@@ -203,7 +203,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
 
 		if (wait_event_interruptible(cl->rx_wait,
 				(!list_empty(&cl->rd_completed)) ||
-				mei_cl_is_transitioning(cl))) {
+				(!mei_cl_is_connected(cl)))) {
 
 			if (signal_pending(current))
 				return -EINTR;
@@ -211,7 +211,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
 		}
 
 		mutex_lock(&dev->device_lock);
-		if (mei_cl_is_transitioning(cl)) {
+		if (!mei_cl_is_connected(cl)) {
 			rets = -EBUSY;
 			goto out;
 		}