Feb 22 2016

staging: most: hdm-usb: Use macro DIV_ROUND_UP 

Author: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>

The macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /(d)).
It clarifies the divisor calculations. This occurence was detected using the
coccinelle script:
@@
expression e1;
expression e2;
@@
(
- ((e1) + e2 - 1) / (e2)
+ DIV_ROUND_UP(e1,e2)
|
- ((e1) + (e2 - 1))/ (e2)
+ DIV_ROUND_UP(e1,e2)
)

The macro CEILING was dropped altogether and has been replaced with
DIV_ROUND_UP.

Signed-off-by: Bhaktipriya Shridhar 
Signed-off-by: Greg Kroah-Hartman 

---
 drivers/staging/most/hdm-usb/hdm_usb.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
 
diff --git a/drivers/staging/most/hdm-usb/hdm_usb.c b/drivers/staging/most/hdm-usb/hdm_usb.c
index 3ee9e6f..9d5555d 100644
--- a/drivers/staging/most/hdm-usb/hdm_usb.c
+++ b/drivers/staging/most/hdm-usb/hdm_usb.c
@@ -40,7 +40,6 @@
 #define MAX_SUFFIX_LEN		10
 #define MAX_STRING_LEN		80
 #define MAX_BUF_SIZE		0xFFFF
-#define CEILING(x, y)		(((x) + (y) - 1) / (y))
 
 #define USB_VENDOR_ID_SMSC	0x0424  /* VID: SMSC */
 #define USB_DEV_ID_BRDG		0xC001  /* PID: USB Bridge */
@@ -786,7 +785,7 @@ static int hdm_configure_channel(struct most_interface *iface, int channel,
 	temp_size += tail_space;
 
 	/* calculate extra length to comply w/ HW padding */
-	conf->extra_len = (CEILING(temp_size, USB_MTU) * USB_MTU)
+	conf->extra_len = (DIV_ROUND_UP(temp_size, USB_MTU) * USB_MTU)
 			  - conf->buffer_size;
 exit:
 	mdev->conf[channel] = *conf;

qlambert