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[media] media: rc: Use bsearch library function 

Replace self coded binary search, by existing library version.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
hifive-unleashed-5.1
Thomas Meyer 2017-09-08 13:33:36 -03:00 committed by Mauro Carvalho Chehab
parent eed008e605
commit 8ca01d4f95
1 changed files with 20 additions and 14 deletions
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34
drivers/media/rc/rc-main.c
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@ -15,6 +15,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <media/rc-core.h>
#include <linux/bsearch.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/input.h>
@ -460,6 +461,18 @@ static int ir_setkeytable(struct rc_dev *dev,
return rc;
}
static int rc_map_cmp(const void *key, const void *elt)
{
const unsigned int *scancode = key;
const struct rc_map_table *e = elt;
if (*scancode < e->scancode)
return -1;
else if (*scancode > e->scancode)
return 1;
return 0;
}
/**
* ir_lookup_by_scancode() - locate mapping by scancode
* @rc_map: the struct rc_map to search
@ -472,21 +485,14 @@ static int ir_setkeytable(struct rc_dev *dev,
static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map,
unsigned int scancode)
{
int start = 0;
int end = rc_map->len - 1;
int mid;
struct rc_map_table *res;
while (start <= end) {
mid = (start + end) / 2;
if (rc_map->scan[mid].scancode < scancode)
start = mid + 1;
else if (rc_map->scan[mid].scancode > scancode)
end = mid - 1;
else
return mid;
}
return -1U;
res = bsearch(&scancode, rc_map->scan, rc_map->len,
sizeof(struct rc_map_table), rc_map_cmp);
if (!res)
return -1U;
else
return res - rc_map->scan;
}
/**