From: Peter Ujfalusi <peter.ujfalusi@ti.com>
Date: Thu, 12 Dec 2019 13:55:46 +0000 (+0200)
Subject: spi: mxs: Use dma_request_chan() instead dma_request_slave_channel()
X-Git-Tag: v5.6-rc1~194^2^2~38
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7ccffd41b2d4d180dcdcc03c54c446621e34bca5;p=thirdparty%2Flinux.git

spi: mxs: Use dma_request_chan() instead dma_request_slave_channel()

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>
Link: https://lore.kernel.org/r/20191212135550.4634-6-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 996c1c8a9c719..dce85ee07cd00 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;
 	}