[PATCH] ch_ktls: Remove redundant variable result

[PATCH] ch_ktls: Remove redundant variable result

[Jiapeng Chong]

Variable result 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/chelsio/inline_crypto/ch_ktls/chcr_ktls.c:1488:2:
warning: Value stored to 'pos' is never read
[clang-analyzer-deadcode.DeadStores].

drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c:876:3:
warning: Value stored to 'pos' is never read
[clang-analyzer-deadcode.DeadStores].

drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c:36:3:
warning: Value stored to 'start' is never read
[clang-analyzer-deadcode.DeadStores].

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
---
 drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c b/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
index a3f5b80..ef3f1e9 100644
--- a/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
+++ b/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
@@ -33,7 +33,6 @@ static int chcr_get_nfrags_to_send(struct sk_buff *skb, u32 start, u32 len)
 
 	if (unlikely(start < skb_linear_data_len)) {
 		frag_size = min(len, skb_linear_data_len - start);
-		start = 0;
 	} else {
 		start -= skb_linear_data_len;
 
@@ -873,10 +872,10 @@ static int chcr_ktls_xmit_tcb_cpls(struct chcr_ktls_info *tx_info,
 	}
 	/* update receive window */
 	if (first_wr || tx_info->prev_win != tcp_win) {
-		pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
-						 TCB_RCV_WND_W,
-						 TCB_RCV_WND_V(TCB_RCV_WND_M),
-						 TCB_RCV_WND_V(tcp_win), 0);
+		chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
+					   TCB_RCV_WND_W,
+					   TCB_RCV_WND_V(TCB_RCV_WND_M),
+					   TCB_RCV_WND_V(tcp_win), 0);
 		tx_info->prev_win = tcp_win;
 		cpl++;
 	}
@@ -1485,7 +1484,6 @@ static int chcr_ktls_tx_plaintxt(struct chcr_ktls_info *tx_info,
 	wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
 	wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
 	wr->cookie = 0;
-	pos += sizeof(*wr);
 	/* ULP_TXPKT */
 	ulptx = (struct ulp_txpkt *)(wr + 1);
 	ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
-- 
1.8.3.1

Re: [PATCH] ch_ktls: Remove redundant variable result

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Fri, 23 Apr 2021 17:52:23 +0800 you wrote:
> Variable result 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/chelsio/inline_crypto/ch_ktls/chcr_ktls.c:1488:2:
> warning: Value stored to 'pos' is never read
> [clang-analyzer-deadcode.DeadStores].
> 
> [...]

Here is the summary with links:
  - ch_ktls: Remove redundant variable result
    https://git.kernel.org/netdev/net-next/c/bf7d20cd51d7

You are awesome, thank you!
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