linux-kernel - [PATCH] pcnet32: Remove redundant variable prev_link and curr

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Message-Id: <1619346918-49035-1-git-send-email-jiapeng.chong@linux.alibaba.com>
Date:   Sun, 25 Apr 2021 18:35:18 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     pcnet32@...ntier.com
Cc:     davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Subject: [PATCH] pcnet32: Remove redundant variable prev_link and curr_link

Variable prev_link and curr_link is being assigned a value from a
calculation however the variable is never read, so this redundant
variable can be removed.

Cleans up the following clang-analyzer warning:

drivers/net/ethernet/amd/pcnet32.c:2857:4: warning: Value stored to
'prev_link' is never read [clang-analyzer-deadcode.DeadStores].

drivers/net/ethernet/amd/pcnet32.c:2856:4: warning: Value stored to
'curr_link' is never read [clang-analyzer-deadcode.DeadStores].

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
 drivers/net/ethernet/amd/pcnet32.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amd/pcnet32.c b/drivers/net/ethernet/amd/pcnet32.c
index f78daba..aa41250 100644
--- a/drivers/net/ethernet/amd/pcnet32.c
+++ b/drivers/net/ethernet/amd/pcnet32.c
@@ -2853,8 +2853,7 @@ static void pcnet32_check_media(struct net_device *dev, int verbose)
 			netif_info(lp, link, dev, "link down\n");
 		}
 		if (lp->phycount > 1) {
-			curr_link = pcnet32_check_otherphy(dev);
-			prev_link = 0;
+			pcnet32_check_otherphy(dev);
 		}
 	} else if (verbose || !prev_link) {
 		netif_carrier_on(dev);
-- 
1.8.3.1