musb_host: refactor musb_save_toggle() (take 2)

Refactor musb_save_toggle() as follows:

 - replace 'struct musb_hw_ep *ep' parameter by 'struct
   musb_qh *qh' to avoid re-calculating this value 

 - move usb_settogle() call out of the *if* operator.

This is a net minor shrink of source and object code.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 12 insertions, 23 deletions

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index db1b57415ec7..bf194d244533 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -321,35 +321,24 @@ __acquires(musb->lock)
         spin_lock(&musb->lock);
 }
 
-/* for bulk/interrupt endpoints only */
-static inline void
-musb_save_toggle(struct musb_hw_ep *ep, int is_in, struct urb *urb)
+/* For bulk/interrupt endpoints only */
+static inline void musb_save_toggle(struct musb_qh *qh, int is_in,
+                                    struct urb *urb)
 {
-        struct usb_device       *udev = urb->dev;
+        void __iomem            *epio = qh->hw_ep->regs;
         u16                     csr;
-        void __iomem            *epio = ep->regs;
-        struct musb_qh          *qh;
 
-        /* FIXME:  the current Mentor DMA code seems to have
+        /*
+         * FIXME: the current Mentor DMA code seems to have
          * problems getting toggle correct.
          */
 
-        if (is_in || ep->is_shared_fifo)
-                qh = ep->in_qh;
+        if (is_in)
+                csr = musb_readw(epio, MUSB_RXCSR) & MUSB_RXCSR_H_DATATOGGLE;
         else
-                qh = ep->out_qh;
+                csr = musb_readw(epio, MUSB_TXCSR) & MUSB_TXCSR_H_DATATOGGLE;
 
-        if (!is_in) {
-                csr = musb_readw(epio, MUSB_TXCSR);
-                usb_settoggle(udev, qh->epnum, 1,
-                        (csr & MUSB_TXCSR_H_DATATOGGLE)
-                                ? 1 : 0);
-        } else {
-                csr = musb_readw(epio, MUSB_RXCSR);
-                usb_settoggle(udev, qh->epnum, 0,
-                        (csr & MUSB_RXCSR_H_DATATOGGLE)
-                                ? 1 : 0);
-        }
+        usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0);
 }
 
 /* caller owns controller lock, irqs are blocked */
@@ -365,7 +354,7 @@ musb_giveback(struct musb_qh *qh, struct urb *urb, int status)
         switch (qh->type) {
         case USB_ENDPOINT_XFER_BULK:
         case USB_ENDPOINT_XFER_INT:
-                musb_save_toggle(ep, is_in, urb);
+                musb_save_toggle(qh, is_in, urb);
                 break;
         case USB_ENDPOINT_XFER_ISOC:
                 if (status == 0 && urb->error_count)
@@ -1427,7 +1416,7 @@ static void musb_bulk_rx_nak_timeout(struct musb *musb, struct musb_hw_ep *ep)
                         urb->actual_length += dma->actual_len;
                         dma->actual_len = 0L;
                 }
-                musb_save_toggle(ep, 1, urb);
+                musb_save_toggle(cur_qh, 1, urb);
 
                 /* move cur_qh to end of queue */
                 list_move_tail(&cur_qh->ring, &musb->in_bulk);