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

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Date:   Sun, 12 Apr 2020 11:33:11 +0200
From:   Oscar Carter <oscar.carter@....com>
To:     Forest Bond <forest@...ttletooquiet.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Oscar Carter <oscar.carter@....com>,
        Quentin Deslandes <quentin.deslandes@...ev.co.uk>,
        Malcolm Priestley <tvboxspy@...il.com>,
        Colin Ian King <colin.king@...onical.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
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 <oscar.carter@....com>
---
 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