linux-kernel - [PATCH] rtlwifi: rtl8192cu: Remove variable self-assignment in rf.c

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Message-Id: <20180207202634.98937-1-mka@chromium.org>
Date:   Wed,  7 Feb 2018 12:26:34 -0800
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Ping-Ke Shih <pkshih@...ltek.com>,
        Kalle Valo <kvalo@...eaurora.org>
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Guenter Roeck <groeck@...omium.org>,
        Justin TerAvest <teravest@...omium.org>,
        Craig Bergstrom <craigb@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH] rtlwifi: rtl8192cu: Remove variable self-assignment in rf.c

In _rtl92c_get_txpower_writeval_by_regulatory() the variable writeVal
is assigned to itself in an if ... else statement, apparently only to
document that the branch condition is handled and that a previously read
value should be returned unmodified. The self-assignment causes clang to
raise the following warning:

drivers/net/wireless/realtek/rtlwifi/rtl8192cu/rf.c:304:13:
  error: explicitly assigning value of variable of type 'u32'
    (aka 'unsigned int') to itself [-Werror,-Wself-assign]
  writeVal = writeVal;

Replace the self-assignment with a semicolon, which still serves to
document the 'handling' of the branch condition.

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
---
 drivers/net/wireless/realtek/rtlwifi/rtl8192cu/rf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/rf.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/rf.c
index 9cff6bc4049c..4db92496c122 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/rf.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/rf.c
@@ -301,7 +301,7 @@ static void _rtl92c_get_txpower_writeval_by_regulatory(struct ieee80211_hw *hw,
 			writeVal = writeVal - 0x06060606;
 		else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
 			 TXHIGHPWRLEVEL_BT2)
-			writeVal = writeVal;
+			;
 		*(p_outwriteval + rf) = writeVal;
 	}
 }
-- 
2.16.0.rc1.238.g530d649a79-goog