Commit bdc58e3b authored by simran singhal's avatar simran singhal Committed by Greg Kroah-Hartman
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staging: most: Using macro DIV_ROUND_UP 



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)
)

Signed-off-by: default avatarsimran singhal <singhalsimran0@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3efc6616

drivers/staging/most/hdm-dim2/dim2_hal.c

+4 −3
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include "dim2_errors.h"

#include "dim2_reg.h"

#include <linux/stddef.h>

#include <linux/kernel.h>



/*

 * Size factor for isochronous DBR buffer.
@@ -49,7 +50,7 @@ 
#define DBR_SIZE  (16 * 1024) /* specified by IP */

#define DBR_BLOCK_SIZE  (DBR_SIZE / 32 / DBR_MAP_SIZE)



#define ROUND_UP_TO(x, d)  (((x) + (d) - 1) / (d) * (d))

#define ROUND_UP_TO(x, d)  (DIV_ROUND_UP(x, (d)) * (d))



/* -------------------------------------------------------------------------- */

/* generic helper functions and macros */
@@ -117,7 +118,7 @@ static int alloc_dbr(u16 size) 
		return DBR_SIZE; /* out of memory */



	for (i = 0; i < DBR_MAP_SIZE; i++) {

		u32 const blocks = (size + DBR_BLOCK_SIZE - 1) / DBR_BLOCK_SIZE;

		u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);

		u32 mask = ~((~(u32)0) << blocks);



		do {
@@ -137,7 +138,7 @@ static int alloc_dbr(u16 size) 
static void free_dbr(int offs, int size)

{

	int block_idx = offs / DBR_BLOCK_SIZE;

	u32 const blocks = (size + DBR_BLOCK_SIZE - 1) / DBR_BLOCK_SIZE;

	u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);

	u32 mask = ~((~(u32)0) << blocks);



	mask <<= block_idx % 32;