Replace the for loops of the vnt_update_top_rates function by the fls
function.
The purpose of the two for loops is to find the most significant bit set
in a range of bits. So, they can be replace by the fls function (find
last set) with a previous mask to define the range.
This way avoid the iteration over unnecessary for loops.
The header "linux/bits.h" can be remove as it is included in the header
"linux/bitops.h".
Signed-off-by: Oscar Carter <oscar.carter@xxxxxxx>
---
Changelog v1 -> v2
- Replace the expression pos-- with the expresion (pos - 1) as Dan
Carpenter suggested.
drivers/staging/vt6656/card.c | 28 ++++++----------------------
1 file changed, 6 insertions(+), 22 deletions(-)
diff --git a/drivers/staging/vt6656/card.c b/drivers/staging/vt6656/card.c
index f8bfadd4b506..2478edee756a 100644
--- a/drivers/staging/vt6656/card.c
+++ b/drivers/staging/vt6656/card.c
@@ -26,7 +26,7 @@
*
*/
-#include <linux/bits.h>
+#include <linux/bitops.h>
#include "device.h"
#include "card.h"
#include "baseband.h"
@@ -223,29 +223,13 @@ void vnt_update_ifs(struct vnt_private *priv)
void vnt_update_top_rates(struct vnt_private *priv)
{
- u8 top_ofdm = RATE_24M, top_cck = RATE_1M;
- u8 i;
+ int pos;
- /*Determines the highest basic rate.*/
- for (i = RATE_54M; i >= RATE_6M; i--) {
- if (priv->basic_rates & BIT(i)) {
- top_ofdm = i;
- break;
- }
- }
-
- priv->top_ofdm_basic_rate = top_ofdm;
-
- for (i = RATE_11M;; i--) {
- if (priv->basic_rates & BIT(i)) {
- top_cck = i;
- break;
- }
- if (i == RATE_1M)
- break;
- }
+ pos = fls(priv->basic_rates & GENMASK(RATE_54M, RATE_6M));
+ priv->top_ofdm_basic_rate = pos ? (pos - 1) : RATE_24M;
- priv->top_cck_basic_rate = top_cck;
+ pos = fls(priv->basic_rates & GENMASK(RATE_11M, RATE_1M));
+ priv->top_cck_basic_rate = pos ? (pos - 1) : RATE_1M;
}
int vnt_ofdm_min_rate(struct vnt_private *priv)
--
2.20.1
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