usb: musb: cppi41: exit early when tx fifo is empty

as soon as we find out tx fifo is empty, there's
no need to break out of the loop just to have another
branch to complete the transfer. We can just complete
transfer and exit early.

Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index 73ac9835485d617456dd98d6c4019ac803e71fef..4407f30d0b86c05404a35a7ce40942d258bef0eb 100644 (file)
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -280,19 +280,15 @@ static void cppi41_dma_callback(void *private_data)
 
                do {
                        empty = musb_is_tx_fifo_empty(hw_ep);
-                       if (empty)
-                               break;
+                       if (empty) {
+                               cppi41_trans_done(cppi41_channel);
+                               goto out;
+                       }
                        wait--;
                        if (!wait)
                                break;
                        udelay(1);
                } while (1);
-
-               empty = musb_is_tx_fifo_empty(hw_ep);
-               if (empty) {
-                       cppi41_trans_done(cppi41_channel);
-                       goto out;
-               }
        }
        list_add_tail(&cppi41_channel->tx_check,
                        &controller->early_tx_list);