[PATCH v4] staging: dgnc: replace udelay with usleep_range

[Aishwarya Pant <aishpant@gmail.com>]

Fix checkpatch warning on dgnc_cls.c : CHECK usleep_range
is preferred over udelay. There is one ocurrence of udelay in
function cls_uart_init with non-atomic context that can be safely
replaced by usleep_range(t, t + delta) where delta is t (as t is
between 10 and 20 microseconds). Also replace usleep_range by udelay in
function cls_flush_uart_write as it is called under a channel lock.

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
---
Changes in v4:
	- Fix commit message formatting

Changes in v3:
	- Replace usleep_range by udelay in cls_flush_uart_write
	- Fix diff in commit message

Changes in v2:
	- Revert usage of usleep_range in atomic context
	- Cleanup the commit message

 drivers/staging/dgnc/dgnc_cls.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/dgnc/dgnc_cls.c b/drivers/staging/dgnc/dgnc_cls.c
index c20ffdd..7068c3b 100644
--- a/drivers/staging/dgnc/dgnc_cls.c
+++ b/drivers/staging/dgnc/dgnc_cls.c
@@ -609,7 +609,7 @@ static void cls_flush_uart_write(struct channel_t *ch)
 
 	writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_XMIT),
 	       &ch->ch_cls_uart->isr_fcr);
-	usleep_range(10, 20);
+	udelay(10);
 
 	ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
 }
@@ -1096,7 +1096,7 @@ static void cls_uart_init(struct channel_t *ch)
 
 	writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 	       &ch->ch_cls_uart->isr_fcr);
-	udelay(10);
+	usleep_range(10, 20);
 
 	ch->ch_flags |= (CH_FIFO_ENABLED | CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
 
-- 
2.7.4