usb: gadget: mv_udc: reduce the delay interval

There are several places use udelay(LOOPS_USEC) to wait the status to be
changed, but the delay interval is a bit too long, so reduce it to
enhance the performance.

Signed-off-by: Neil Zhang <zhangwm@marvell.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index 75db2c3..9e40f89 100644 (file)
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -53,7 +53,7 @@
 #define READSAFE_TIMEOUT       1000
 #define DTD_TIMEOUT            1000
 
-#define LOOPS_USEC_SHIFT       4
+#define LOOPS_USEC_SHIFT       1
 #define LOOPS_USEC             (1 << LOOPS_USEC_SHIFT)
 #define LOOPS(timeout)         ((timeout) >> LOOPS_USEC_SHIFT)