2020-04-12 09:34:31

by Oscar Carter

Subject: [PATCH] staging: vt6656: Use BIT() macro instead of bit shift operator

Use the BIT() macro instead of the bit left shift operator. So the code
is more clear.

It's safe to remove the casting to u16 type because the value obtained
never exceeds 16 bits. So the casting is unnecessary.

Signed-off-by: Oscar Carter <[email protected]>
---
drivers/staging/vt6656/card.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/vt6656/card.c b/drivers/staging/vt6656/card.c
index dc3ab10eb630..14e6c71f122c 100644
--- a/drivers/staging/vt6656/card.c
+++ b/drivers/staging/vt6656/card.c
@@ -92,7 +92,7 @@ static u16 vnt_get_cck_rate(struct vnt_private *priv, u16 rate_idx)
u16 ui = rate_idx;

while (ui > RATE_1M) {
- if (priv->basic_rates & (1 << ui))
+ if (priv->basic_rates & BIT(ui))
return ui;
ui--;
}
@@ -129,7 +129,7 @@ static u16 vnt_get_ofdm_rate(struct vnt_private *priv, u16 rate_idx)
}

while (ui > RATE_11M) {
- if (priv->basic_rates & (1 << ui)) {
+ if (priv->basic_rates & BIT(ui)) {
dev_dbg(&priv->usb->dev, "%s rate: %d\n",
__func__, ui);
return ui;
@@ -420,7 +420,7 @@ void vnt_update_top_rates(struct vnt_private *priv)

/*Determines the highest basic rate.*/
for (i = RATE_54M; i >= RATE_6M; i--) {
- if (priv->basic_rates & (u16)(1 << i)) {
+ if (priv->basic_rates & BIT(i)) {
top_ofdm = i;
break;
}
@@ -429,7 +429,7 @@ void vnt_update_top_rates(struct vnt_private *priv)
priv->top_ofdm_basic_rate = top_ofdm;

for (i = RATE_11M;; i--) {
- if (priv->basic_rates & (u16)(1 << i)) {
+ if (priv->basic_rates & BIT(i)) {
top_cck = i;
break;
}
--
2.20.1

2020-04-13 15:08:52

by Greg Kroah-Hartman

Subject: Re: [PATCH] staging: vt6656: Use BIT() macro instead of bit shift operator

On Sun, Apr 12, 2020 at 11:33:11AM +0200, Oscar Carter wrote:
> Use the BIT() macro instead of the bit left shift operator. So the code
> is more clear.
>
> It's safe to remove the casting to u16 type because the value obtained
> never exceeds 16 bits. So the casting is unnecessary.
>
> Signed-off-by: Oscar Carter <[email protected]>
> ---
> drivers/staging/vt6656/card.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)

This too did not apply :(