[PATCH v2 1/1] usb: usleep_range is preferred over udelay where wakeup is flexible

[PATCH v2 1/1] usb: usleep_range is preferred over udelay where wakeup is flexible

[Sunny Kumar]

According to Documentation/timers/timers-howto.txt"
udelay() is only called once from a place where sleeping is allowed.
We can replace it with a call to usleep_range()
with a reasonable upper limit.

This is new version of patch created after discussion.

Signed-off-by: Sunny Kumar <sunny.kumar.roy@gmail.com>
---
 drivers/usb/storage/transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c
index 540add2..5e67f63 100644
--- a/drivers/usb/storage/transport.c
+++ b/drivers/usb/storage/transport.c
@@ -1111,7 +1111,7 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
 	 * command phase and the data phase.  Some devices need a little
 	 * more than that, probably because of clock rate inaccuracies. */
 	if (unlikely(us->fflags & US_FL_GO_SLOW))
-		udelay(125);
+		usleep_range(125, 150);
 
 	if (transfer_length) {
 		unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ? 
-- 
2.1.4