usb: musb: cppi41: do not call udelay()

according to comment in code, HS completion
will happen pretty fast, instead of using
udelay(), let's just busy loop and drop a
cpu_relax() where udelay() was.

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 4407f30..9dc45a4 100644 (file)
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -287,7 +287,7 @@ static void cppi41_dma_callback(void *private_data)
                        wait--;
                        if (!wait)
                                break;
-                       udelay(1);
+                       cpu_relax();
                } while (1);
        }
        list_add_tail(&cppi41_channel->tx_check,