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From: Philipp Puschmann <philipp.puschmann@emlix.com>
To: linux-kernel@vger.kernel.org
Cc: jlu@pengutronix.de, yibin.gong@nxp.com, fugang.duan@nxp.com,
	l.stach@pengutronix.de, dan.j.williams@intel.com,
	vkoul@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
	dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	Philipp Puschmann <philipp.puschmann@emlix.com>
Subject: [PATCH v5 3/3] dmaengine: imx-sdma: drop redundant variable
Date: Mon, 23 Sep 2019 15:58:08 +0200	[thread overview]
Message-ID: <20190923135808.815-4-philipp.puschmann@emlix.com> (raw)
In-Reply-To: <20190923135808.815-1-philipp.puschmann@emlix.com>

In sdma_prep_dma_cyclic buf is redundant. Drop it.

Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.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


WARNING: multiple messages have this Message-ID (diff)
From: Philipp Puschmann <philipp.puschmann@emlix.com>
To: linux-kernel@vger.kernel.org
Cc: fugang.duan@nxp.com, jlu@pengutronix.de, festevam@gmail.com,
	s.hauer@pengutronix.de, vkoul@kernel.org, linux-imx@nxp.com,
	kernel@pengutronix.de, dmaengine@vger.kernel.org,
	dan.j.williams@intel.com, yibin.gong@nxp.com,
	shawnguo@kernel.org,
	Philipp Puschmann <philipp.puschmann@emlix.com>,
	linux-arm-kernel@lists.infradead.org, l.stach@pengutronix.de
Subject: [PATCH v5 3/3] dmaengine: imx-sdma: drop redundant variable
Date: Mon, 23 Sep 2019 15:58:08 +0200	[thread overview]
Message-ID: <20190923135808.815-4-philipp.puschmann@emlix.com> (raw)
In-Reply-To: <20190923135808.815-1-philipp.puschmann@emlix.com>

In sdma_prep_dma_cyclic buf is redundant. Drop it.

Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.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


_______________________________________________
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  parent reply	other threads:[~2019-09-23 13:58 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-23 13:58 [PATCH v5 0/3] Fix UART DMA freezes for i.MX SOCs Philipp Puschmann
2019-09-23 13:58 ` Philipp Puschmann
2019-09-23 13:58 ` [PATCH v5 1/3] dmaengine: imx-sdma: fix buffer ownership Philipp Puschmann
2019-09-23 13:58   ` Philipp Puschmann
2019-12-03  9:47   ` Lucas Stach
2019-12-03  9:47     ` Lucas Stach
2019-12-04  9:19   ` Robin Gong
2019-12-04  9:19     ` Robin Gong
2019-12-10  9:44     ` Philipp Puschmann
2019-12-10  9:44       ` Philipp Puschmann
2019-12-10 13:01       ` Robin Gong
2019-12-10 13:01         ` Robin Gong
2019-09-23 13:58 ` [PATCH v5 2/3] dmaengine: imx-sdma: fix dma freezes Philipp Puschmann
2019-09-23 13:58   ` Philipp Puschmann
2019-09-24  3:14   ` Robin Gong
2019-09-24  3:14     ` Robin Gong
2019-09-23 13:58 ` Philipp Puschmann [this message]
2019-09-23 13:58   ` [PATCH v5 3/3] dmaengine: imx-sdma: drop redundant variable Philipp Puschmann
2019-09-23 14:55 ` [PATCH v5 0/3] Fix UART DMA freezes for i.MX SOCs Adam Ford
2019-09-23 14:55   ` Adam Ford
2019-09-23 15:06   ` Philipp Puschmann
2019-09-23 15:06     ` Philipp Puschmann
2019-09-23 15:09     ` Jan Lübbe
2019-09-23 15:09       ` Jan Lübbe

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