linux-kernel - [PATCH] dmaengine: fsl-edma: remove redundant assignment to pointer last

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Message-Id: <20220614184759.164379-1-colin.i.king@gmail.com>
Date:   Tue, 14 Jun 2022 19:47:59 +0100
From:   Colin Ian King <colin.i.king@...il.com>
To:     Vinod Koul <vkoul@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        dmaengine@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] dmaengine: fsl-edma: remove redundant assignment to pointer last_sg

The pointer last_sg is being assigned a value at the start of a loop
however it is never read and is being re-assigned later on in both
brances of an if-statement. The assignment is redundant and can be
removed.

Cleans up clang scan-build warning:
drivers/dma/fsl-edma-common.c:563:3: warning: Value stored to 'last_sg'
is never read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@...il.com>
---
 drivers/dma/fsl-edma-common.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index 3ae05d1446a5..a06a1575a2a5 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -559,9 +559,6 @@ struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg(
 	}
 
 	for_each_sg(sgl, sg, sg_len, i) {
-		/* get next sg's physical address */
-		last_sg = fsl_desc->tcd[(i + 1) % sg_len].ptcd;
-
 		if (direction == DMA_MEM_TO_DEV) {
 			src_addr = sg_dma_address(sg);
 			dst_addr = fsl_chan->dma_dev_addr;
-- 
2.35.3