linux-kernel - [PATCH v2] staging: rtl8712: remove the condition with no effect

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Message-ID: <YX61KpxdmCQtoFSX@Sauravs-MacBook-Air.local>
Date:   Sun, 31 Oct 2021 20:54:26 +0530
From:   Saurav Girepunje <saurav.girepunje@...il.com>
To:     Larry.Finger@...inger.net, florian.c.schilhabel@...glemail.com,
        gregkh@...uxfoundation.org, saurav.girepunje@...il.com,
        alec@...celle.de, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Cc:     saurav.girepunje@...mail.com
Subject: [PATCH v2] staging: rtl8712: remove the condition with no effect

Remove the if condition check and else code section in
query_rx_phy_status(). As variable cck_highpwr is assign a value of '0'
after this assignment, if condition check !cck_highpwr is always
going to be true. So remove the if condition check as well as else
section which will be never true.

After removing the if condition, There is no use of local variable
cck_highpwr. Remove the local variable cck_highpwr. Merge the two lines
as length of lines together is coming within limit of 80 columns. As
per Linux kernel coding style.

Signed-off-by: Saurav Girepunje <saurav.girepunje@...il.com>
---

Changelog V2:

	Merge the two lines as length of lines together is coming within
	limit of 80 columns. As per Linux kernel coding style.

Changelog V1:

	Remove the if condition check and else code section in
	query_rx_phy_status(). As variable cck_highpwr is assign a value of '0'
	after this assignment, if condition check !cck_highpwr is always
	going to be true. So remove the if condition check as well as else
	section which will be never true.

	After removing the if condition there is no use of local variable
	cck_highpwr. Remove the local variable cck_highpwr.

 drivers/staging/rtl8712/rtl8712_recv.c | 71 ++++++++------------------
 1 file changed, 22 insertions(+), 49 deletions(-)

diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c
index 0ffb30f1af7e..1c00905b4799 100644
--- a/drivers/staging/rtl8712/rtl8712_recv.c
+++ b/drivers/staging/rtl8712/rtl8712_recv.c
@@ -708,7 +708,7 @@ static void query_rx_phy_status(struct _adapter *padapter,
 	s8 rx_pwr[4], rx_pwr_all;
 	u8 pwdb_all;
 	u32 rssi, total_rssi = 0;
-	u8 bcck_rate = 0, rf_rx_num = 0, cck_highpwr = 0;
+	u8 bcck_rate = 0, rf_rx_num = 0;
 	struct phy_cck_rx_status *pcck_buf;
 	u8 sq;

@@ -723,55 +723,28 @@ static void query_rx_phy_status(struct _adapter *padapter,
 		 * (2)PWDB, Average PWDB calculated by hardware
 		 * (for rate adaptive)
 		 */
-		if (!cck_highpwr) {
-			report = pcck_buf->cck_agc_rpt & 0xc0;
-			report >>= 6;
-			switch (report) {
-			/* Modify the RF RNA gain value to -40, -20,
-			 * -2, 14 by Jenyu's suggestion
-			 * Note: different RF with the different
-			 * RNA gain.
-			 */
-			case 0x3:
-				rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt &
-					     0x3e);
-				break;
-			case 0x2:
-				rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt &
-					     0x3e);
-				break;
-			case 0x1:
-				rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt &
-					     0x3e);
-				break;
-			case 0x0:
-				rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt &
-					     0x3e);
-				break;
-			}
-		} else {
-			report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) &
-				 0x60;
-			report >>= 5;
-			switch (report) {
-			case 0x3:
-				rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt &
-					     0x1f) << 1);
-				break;
-			case 0x2:
-				rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt &
-					     0x1f) << 1);
-				break;
-			case 0x1:
-				rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt &
-					     0x1f) << 1);
-				break;
-			case 0x0:
-				rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt &
-					     0x1f) << 1);
-				break;
-			}
+		report = pcck_buf->cck_agc_rpt & 0xc0;
+		report >>= 6;
+		switch (report) {
+		/* Modify the RF RNA gain value to -40, -20,
+		 * -2, 14 by Jenyu's suggestion
+		 * Note: different RF with the different
+		 * RNA gain.
+		 */
+		case 0x3:
+			rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt & 0x3e);
+			break;
+		case 0x2:
+			rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt & 0x3e);
+			break;
+		case 0x1:
+			rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt & 0x3e);
+			break;
+		case 0x0:
+			rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt & 0x3e);
+			break;
 		}
+
 		pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
 		/* CCK gain is smaller than OFDM/MCS gain,*/
 		/* so we add gain diff by experiences, the val is 6 */
--
2.33.0