linux-kernel - [PATCH 4.14 36/45] net: lan78xx: Avoid unnecessary self assignment

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Date:   Mon, 20 Dec 2021 15:34:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Nathan Chancellor <natechancellor@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Anders Roxell <anders.roxell@...aro.org>
Subject: [PATCH 4.14 36/45] net: lan78xx: Avoid unnecessary self assignment

From: Nathan Chancellor <natechancellor@...il.com>

commit 94e7c844990f0db92418586b107be135b4963b66 upstream.

Clang warns when a variable is assigned to itself.

drivers/net/usb/lan78xx.c:940:11: warning: explicitly assigning value of
variable of type 'u32' (aka 'unsigned int') to itself [-Wself-assign]
                        offset = offset;
                        ~~~~~~ ^ ~~~~~~
1 warning generated.

Reorder the if statement to acheive the same result and avoid a self
assignment warning.

Link: https://github.com/ClangBuiltLinux/linux/issues/129
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/usb/lan78xx.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -920,11 +920,9 @@ static int lan78xx_read_otp(struct lan78
 	ret = lan78xx_read_raw_otp(dev, 0, 1, &sig);
 
 	if (ret == 0) {
-		if (sig == OTP_INDICATOR_1)
-			offset = offset;
-		else if (sig == OTP_INDICATOR_2)
+		if (sig == OTP_INDICATOR_2)
 			offset += 0x100;
-		else
+		else if (sig != OTP_INDICATOR_1)
 			ret = -EINVAL;
 		if (!ret)
 			ret = lan78xx_read_raw_otp(dev, offset, length, data);