linux-kernel - [PATCH v5 3/3] dmaengine: imx-sdma: drop redundant variable

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Message-Id: <20190923135808.815-4-philipp.puschmann@emlix.com>
Date:   Mon, 23 Sep 2019 15:58:08 +0200
From:   Philipp Puschmann <philipp.puschmann@...ix.com>
To:     linux-kernel@...r.kernel.org
Cc:     jlu@...gutronix.de, yibin.gong@....com, fugang.duan@....com,
        l.stach@...gutronix.de, dan.j.williams@...el.com, vkoul@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, dmaengine@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Philipp Puschmann <philipp.puschmann@...ix.com>
Subject: [PATCH v5 3/3] dmaengine: imx-sdma: drop redundant variable

In sdma_prep_dma_cyclic buf is redundant. Drop it.

Signed-off-by: Philipp Puschmann <philipp.puschmann@...ix.com>
Reviewed-by: Lucas Stach <l.stach@...gutronix.de>
---

Changelog v3,v4,v5:
 - no changes

Changelog v2:
 - add Reviewed-by tag

 drivers/dma/imx-sdma.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 0b1d6a62423d..0d62664e534e 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1549,7 +1549,7 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
 	struct sdma_engine *sdma = sdmac->sdma;
 	int num_periods = buf_len / period_len;
 	int channel = sdmac->channel;
-	int i = 0, buf = 0;
+	int i;
 	struct sdma_desc *desc;
 
 	dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel);
@@ -1570,7 +1570,7 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
 		goto err_bd_out;
 	}
 
-	while (buf < buf_len) {
+	for (i = 0; i < num_periods; i++) {
 		struct sdma_buffer_descriptor *bd = &desc->bd[i];
 		int param;
 
@@ -1597,9 +1597,6 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
 		bd->mode.status = param;
 
 		dma_addr += period_len;
-		buf += period_len;
-
-		i++;
 	}
 
 	return vchan_tx_prep(&sdmac->vc, &desc->vd, flags);
-- 
2.23.0