[PATCH] rtlwifi: rtl8192de: Style clean-ups

Clean up some style issues:
- Use ARRAY_SIZE() even though it's a u8 array.
- Remove redundant CHANNEL_MAX_NUMBER_2G define.
Additionally fix some dead code WARNs.

Cc: Ping-Ke Shih <pkshih@realtek.com>
Cc: Kalle Valo <redacted>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Larry Finger <redacted>
Cc: Colin Ian King <redacted>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <redacted>
---
 drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c | 8 +++-----
 drivers/net/wireless/realtek/rtlwifi/wifi.h          | 1 -
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
index b32fa7a75f17..9807c9e91998 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c

@@ -899,7 +899,7 @@ static u8 _rtl92c_phy_get_rightchnlplace(u8 chnl)
 	u8 place = chnl;
 
 	if (chnl > 14) {
-		for (place = 14; place < sizeof(channel5g); place++) {
+		for (place = 14; place < ARRAY_SIZE(channel5g); place++) {
 			if (channel5g[place] == chnl) {
 				place++;
 				break;

@@ -2861,16 +2861,14 @@ u8 rtl92d_phy_sw_chnl(struct ieee80211_hw *hw)
 	case BAND_ON_5G:
 		/* Get first channel error when change between
 		 * 5G and 2.4G band. */
-		if (channel <= 14)
+		if (WARN_ONCE(channel <= 14, "rtl8192de: 5G but channel<=14\n"))
 			return 0;
-		WARN_ONCE((channel <= 14), "rtl8192de: 5G but channel<=14\n");
 		break;
 	case BAND_ON_2_4G:
 		/* Get first channel error when change between
 		 * 5G and 2.4G band. */
-		if (channel > 14)
+		if (WARN_ONCE(channel > 14, "rtl8192de: 2G but channel>14\n"))
 			return 0;
-		WARN_ONCE((channel > 14), "rtl8192de: 2G but channel>14\n");
 		break;
 	default:
 		WARN_ONCE(true, "rtl8192de: Invalid WirelessMode(%#x)!!\n",

diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h b/drivers/net/wireless/realtek/rtlwifi/wifi.h
index aa07856411b1..31f9e9e5c680 100644
--- a/drivers/net/wireless/realtek/rtlwifi/wifi.h
+++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h

@@ -108,7 +108,6 @@
 #define	CHANNEL_GROUP_IDX_5GM		6
 #define	CHANNEL_GROUP_IDX_5GH		9
 #define	CHANNEL_GROUP_MAX_5G		9
-#define CHANNEL_MAX_NUMBER_2G		14
 #define AVG_THERMAL_NUM			8
 #define AVG_THERMAL_NUM_88E		4
 #define AVG_THERMAL_NUM_8723BE		4

-- 
2.30.2

There are still many places we can use ARRAY_SIZE() instead of sizeof().
Could you fix them within this file, even this driver?
Otherwise, this patch looks good to me.

Acked-by: Ping-Ke Shih <pkshih@realtek.com>

On Thu, Aug 26, 2021 at 12:58:13AM +0000, Pkshih wrote:

quoted

-----Original Message-----
From: Kees Cook [mailto:keescook@chromium.org]
Sent: Thursday, August 26, 2021 2:34 AM
To: Pkshih
Cc: Kees Cook; Kalle Valo; David S. Miller; Jakub Kicinski; Larry Finger; Colin Ian King;
linux-wireless@vger.kernel.org; netdev@vger.kernel.org; Joe Perches; Kaixu Xia;
linux-kernel@vger.kernel.org; linux-hardening@vger.kernel.org
Subject: [PATCH] rtlwifi: rtl8192de: Style clean-ups

Clean up some style issues:
- Use ARRAY_SIZE() even though it's a u8 array.
- Remove redundant CHANNEL_MAX_NUMBER_2G define.
Additionally fix some dead code WARNs.

Cc: Ping-Ke Shih <pkshih@realtek.com>
Cc: Kalle Valo <redacted>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Larry Finger <redacted>
Cc: Colin Ian King <redacted>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <redacted>
---
 drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c | 8 +++-----
 drivers/net/wireless/realtek/rtlwifi/wifi.h          | 1 -
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c

b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
index b32fa7a75f17..9807c9e91998 100644

--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c

@@ -899,7 +899,7 @@ static u8 _rtl92c_phy_get_rightchnlplace(u8 chnl)
 	u8 place = chnl;

 	if (chnl > 14) {
-		for (place = 14; place < sizeof(channel5g); place++) {
+		for (place = 14; place < ARRAY_SIZE(channel5g); place++) {

There are still many places we can use ARRAY_SIZE() instead of sizeof().
Could you fix them within this file, even this driver?
Otherwise, this patch looks good to me.

Sure! I found a couple more and have sent a v2.

-Kees

Acked-by: Ping-Ke Shih <pkshih@realtek.com>

quoted

 			if (channel5g[place] == chnl) {
 				place++;
 				break;

@@ -2861,16 +2861,14 @@ u8 rtl92d_phy_sw_chnl(struct ieee80211_hw *hw)
 	case BAND_ON_5G:
 		/* Get first channel error when change between
 		 * 5G and 2.4G band. */
-		if (channel <= 14)
+		if (WARN_ONCE(channel <= 14, "rtl8192de: 5G but channel<=14\n"))
 			return 0;
-		WARN_ONCE((channel <= 14), "rtl8192de: 5G but channel<=14\n");
 		break;
 	case BAND_ON_2_4G:
 		/* Get first channel error when change between
 		 * 5G and 2.4G band. */
-		if (channel > 14)
+		if (WARN_ONCE(channel > 14, "rtl8192de: 2G but channel>14\n"))
 			return 0;
-		WARN_ONCE((channel > 14), "rtl8192de: 2G but channel>14\n");
 		break;
 	default:
 		WARN_ONCE(true, "rtl8192de: Invalid WirelessMode(%#x)!!\n",

diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h

b/drivers/net/wireless/realtek/rtlwifi/wifi.h
index aa07856411b1..31f9e9e5c680 100644

--- a/drivers/net/wireless/realtek/rtlwifi/wifi.h
+++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h

@@ -108,7 +108,6 @@
 #define	CHANNEL_GROUP_IDX_5GM		6
 #define	CHANNEL_GROUP_IDX_5GH		9
 #define	CHANNEL_GROUP_MAX_5G		9
-#define CHANNEL_MAX_NUMBER_2G		14
 #define AVG_THERMAL_NUM			8
 #define AVG_THERMAL_NUM_88E		4
 #define AVG_THERMAL_NUM_8723BE		4
--

2.30.2

-- 
Kees Cook