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From: Peter Ujfalusi <peter.ujfalusi@ti.com>
To: <broonie@kernel.org>, <nsaenzjulienne@suse.de>,
	<f.fainelli@gmail.com>, <rjui@broadcom.com>,
	<sbranden@broadcom.com>, <shawnguo@kernel.org>,
	<s.hauer@pengutronix.de>, <baohua@kernel.org>,
	<mcoquelin.stm32@gmail.com>, <alexandre.torgue@st.com>
Cc: <vkoul@kernel.org>, <linux-spi@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-rpi-kernel@lists.infradead.org>,
	<linux-stm32@st-md-mailman.stormreply.com>
Subject: [PATCH 5/9] spi: mxs: Use dma_request_chan() instead dma_request_slave_channel()
Date: Thu, 12 Dec 2019 15:55:46 +0200	[thread overview]
Message-ID: <20191212135550.4634-6-peter.ujfalusi@ti.com> (raw)
In-Reply-To: <20191212135550.4634-1-peter.ujfalusi@ti.com>

dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.

By using dma_request_chan() directly the driver can support deferred
probing against DMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 drivers/spi/spi-mxs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 996c1c8a9c71..dce85ee07cd0 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -590,10 +590,10 @@ static int mxs_spi_probe(struct platform_device *pdev)
 	if (ret)
 		goto out_master_free;
 
-	ssp->dmach = dma_request_slave_channel(&pdev->dev, "rx-tx");
-	if (!ssp->dmach) {
+	ssp->dmach = dma_request_chan(&pdev->dev, "rx-tx");
+	if (IS_ERR(ssp->dmach)) {
 		dev_err(ssp->dev, "Failed to request DMA\n");
-		ret = -ENODEV;
+		ret = PTR_ERR(ssp->dmach);
 		goto out_master_free;
 	}
 
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki


WARNING: multiple messages have this Message-ID (diff)
From: Peter Ujfalusi <peter.ujfalusi@ti.com>
To: <broonie@kernel.org>, <nsaenzjulienne@suse.de>,
	<f.fainelli@gmail.com>, <rjui@broadcom.com>,
	<sbranden@broadcom.com>, <shawnguo@kernel.org>,
	<s.hauer@pengutronix.de>, <baohua@kernel.org>,
	<mcoquelin.stm32@gmail.com>, <alexandre.torgue@st.com>
Cc: linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
	vkoul@kernel.org, linux-rpi-kernel@lists.infradead.org,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 5/9] spi: mxs: Use dma_request_chan() instead dma_request_slave_channel()
Date: Thu, 12 Dec 2019 15:55:46 +0200	[thread overview]
Message-ID: <20191212135550.4634-6-peter.ujfalusi@ti.com> (raw)
In-Reply-To: <20191212135550.4634-1-peter.ujfalusi@ti.com>

dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.

By using dma_request_chan() directly the driver can support deferred
probing against DMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 drivers/spi/spi-mxs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 996c1c8a9c71..dce85ee07cd0 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -590,10 +590,10 @@ static int mxs_spi_probe(struct platform_device *pdev)
 	if (ret)
 		goto out_master_free;
 
-	ssp->dmach = dma_request_slave_channel(&pdev->dev, "rx-tx");
-	if (!ssp->dmach) {
+	ssp->dmach = dma_request_chan(&pdev->dev, "rx-tx");
+	if (IS_ERR(ssp->dmach)) {
 		dev_err(ssp->dev, "Failed to request DMA\n");
-		ret = -ENODEV;
+		ret = PTR_ERR(ssp->dmach);
 		goto out_master_free;
 	}
 
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2019-12-12 13:56 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-12 13:55 [PATCH 0/9] spi: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2019-12-12 13:55 ` Peter Ujfalusi
2019-12-12 13:55 ` Peter Ujfalusi
2019-12-12 13:55 ` [PATCH 1/9] spi: atmel: " Peter Ujfalusi
2019-12-12 13:55   ` Peter Ujfalusi
2019-12-16 12:06   ` Applied "spi: atmel: Use dma_request_chan() instead dma_request_slave_channel()" to the spi tree Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-12 13:55 ` [PATCH 2/9] spi: bcm2835: Release the DMA channel if probe fails after dma_init Peter Ujfalusi
2019-12-12 13:55   ` Peter Ujfalusi
2019-12-16 11:34   ` Nicolas Saenz Julienne
2019-12-16 11:34     ` Nicolas Saenz Julienne
2019-12-16 12:06   ` Applied "spi: bcm2835: Release the DMA channel if probe fails after dma_init" to the spi tree Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-12 13:55 ` [PATCH 3/9] spi: bcm2835: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2019-12-12 13:55   ` Peter Ujfalusi
2019-12-16 12:06   ` Applied "spi: bcm2835: Use dma_request_chan() instead dma_request_slave_channel()" to the spi tree Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-12 13:55 ` [PATCH 4/9] spi: img-spfi: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2019-12-12 13:55   ` Peter Ujfalusi
2019-12-16 12:06   ` Applied "spi: img-spfi: Use dma_request_chan() instead dma_request_slave_channel()" to the spi tree Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-12 13:55 ` Peter Ujfalusi [this message]
2019-12-12 13:55   ` [PATCH 5/9] spi: mxs: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2019-12-16 12:06   ` Applied "spi: mxs: Use dma_request_chan() instead dma_request_slave_channel()" to the spi tree Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-12 13:55 ` [PATCH 6/9] spi: sirf: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2019-12-12 13:55   ` Peter Ujfalusi
2019-12-16 12:06   ` Applied "spi: sirf: Use dma_request_chan() instead dma_request_slave_channel()" to the spi tree Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-12 13:55 ` [PATCH 7/9] spi: spi-fsl-dspi: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2019-12-12 13:55   ` Peter Ujfalusi
2019-12-16 12:06   ` Applied "spi: spi-fsl-dspi: Use dma_request_chan() instead dma_request_slave_channel()" to the spi tree Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-12 13:55 ` [PATCH 8/9] spi: stm32-qspi: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2019-12-12 13:55   ` Peter Ujfalusi
2019-12-16 12:06   ` Applied "spi: stm32-qspi: Use dma_request_chan() instead dma_request_slave_channel()" to the spi tree Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-16 12:06     ` Mark Brown
2019-12-12 13:55 ` [PATCH 9/9] spi: stm32: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2019-12-12 13:55   ` Peter Ujfalusi
2019-12-16 12:05   ` Applied "spi: stm32: Use dma_request_chan() instead dma_request_slave_channel()" to the spi tree Mark Brown
2019-12-16 12:05     ` Mark Brown
2019-12-16 12:05     ` Mark Brown

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