USB: core: message: clean up urb->status usage

This done in anticipation of removal of urb->status, which will make
that patch easier to review and apply in the future.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 530e854..25f63f1 100644 (file)
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -34,13 +34,14 @@ static int usb_start_wait_urb(struct urb *urb, int timeout, int *actual_length)
 { 
        struct completion done;
        unsigned long expire;
-       int status;
+       int retval;
+       int status = urb->status;
 
        init_completion(&done);         
        urb->context = &done;
        urb->actual_length = 0;
-       status = usb_submit_urb(urb, GFP_NOIO);
-       if (unlikely(status))
+       retval = usb_submit_urb(urb, GFP_NOIO);
+       if (unlikely(retval))
                goto out;
 
        expire = timeout ? msecs_to_jiffies(timeout) : MAX_SCHEDULE_TIMEOUT;
@@ -55,15 +56,15 @@ static int usb_start_wait_urb(struct urb *urb, int timeout, int *actual_length)
                        urb->transfer_buffer_length);
 
                usb_kill_urb(urb);
-               status = urb->status == -ENOENT ? -ETIMEDOUT : urb->status;
+               retval = status == -ENOENT ? -ETIMEDOUT : status;
        } else
-               status = urb->status;
+               retval = status;
 out:
        if (actual_length)
                *actual_length = urb->actual_length;
 
        usb_free_urb(urb);
-       return status;
+       return retval;
 }
 
 /*-------------------------------------------------------------------*/
@@ -250,6 +251,7 @@ static void sg_clean (struct usb_sg_request *io)
 static void sg_complete (struct urb *urb)
 {
        struct usb_sg_request   *io = urb->context;
+       int status = urb->status;
 
        spin_lock (&io->lock);
 
@@ -265,21 +267,21 @@ static void sg_complete (struct urb *urb)
         */
        if (io->status
                        && (io->status != -ECONNRESET
-                               || urb->status != -ECONNRESET)
+                               || status != -ECONNRESET)
                        && urb->actual_length) {
                dev_err (io->dev->bus->controller,
                        "dev %s ep%d%s scatterlist error %d/%d\n",
                        io->dev->devpath,
                        usb_pipeendpoint (urb->pipe),
                        usb_pipein (urb->pipe) ? "in" : "out",
-                       urb->status, io->status);
+                       status, io->status);
                // BUG ();
        }
 
-       if (io->status == 0 && urb->status && urb->status != -ECONNRESET) {
-               int             i, found, status;
+       if (io->status == 0 && status && status != -ECONNRESET) {
+               int i, found, retval;
 
-               io->status = urb->status;
+               io->status = status;
 
                /* the previous urbs, and this one, completed already.
                 * unlink pending urbs so they won't rx/tx bad data.
@@ -290,13 +292,13 @@ static void sg_complete (struct urb *urb)
                        if (!io->urbs [i] || !io->urbs [i]->dev)
                                continue;
                        if (found) {
-                               status = usb_unlink_urb (io->urbs [i]);
-                               if (status != -EINPROGRESS
-                                               && status != -ENODEV
-                                               && status != -EBUSY)
+                               retval = usb_unlink_urb (io->urbs [i]);
+                               if (retval != -EINPROGRESS &&
+                                   retval != -ENODEV &&
+                                   retval != -EBUSY)
                                        dev_err (&io->dev->dev,
                                                "%s, unlink --> %d\n",
-                                               __FUNCTION__, status);
+                                               __FUNCTION__, retval);
                        } else if (urb == io->urbs [i])
                                found = 1;
                }