netdev - [PATCH v2] can: softing: Remove redundant variable ptr

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Message-Id: <1619520767-80948-1-git-send-email-jiapeng.chong@linux.alibaba.com>
Date:   Tue, 27 Apr 2021 18:52:47 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     wg@...ndegger.com
Cc:     mkl@...gutronix.de, davem@...emloft.net, kuba@...nel.org,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Subject: [PATCH v2] can: softing: Remove redundant variable ptr

The value stored to ptr in the calculations this patch removes is not
used, so the calculation and the assignment can be removed.

Cleans up the following clang-analyzer warning:

drivers/net/can/softing/softing_main.c:279:3: warning: Value stored to
'ptr' is never read [clang-analyzer-deadcode.DeadStores].

drivers/net/can/softing/softing_main.c:242:3: warning: Value stored to
'ptr' 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>
---
Changes in v2:
  -Make the commit message more clearer.

 drivers/net/can/softing/softing_main.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/can/softing/softing_main.c b/drivers/net/can/softing/softing_main.c
index c44f341..cfc1325 100644
--- a/drivers/net/can/softing/softing_main.c
+++ b/drivers/net/can/softing/softing_main.c
@@ -239,7 +239,6 @@ static int softing_handle_1(struct softing *card)
 				DPRAM_INFO_BUSSTATE2 : DPRAM_INFO_BUSSTATE]);
 		/* timestamp */
 		tmp_u32 = le32_to_cpup((void *)ptr);
-		ptr += 4;
 		ktime = softing_raw2ktime(card, tmp_u32);
 
 		++netdev->stats.rx_errors;
@@ -276,7 +275,6 @@ static int softing_handle_1(struct softing *card)
 		ktime = softing_raw2ktime(card, tmp_u32);
 		if (!(msg.can_id & CAN_RTR_FLAG))
 			memcpy(&msg.data[0], ptr, 8);
-		ptr += 8;
 		/* update socket */
 		if (cmd & CMD_ACK) {
 			/* acknowledge, was tx msg */
-- 
1.8.3.1