linux-kernel - [PATCH] dmaengine: imx-sdma: Set DMA channel to be private

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Message-Id: <20230207045745.1029959-1-kai.heng.feng@canonical.com>
Date:   Tue,  7 Feb 2023 12:57:45 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     vkoul@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] dmaengine: imx-sdma: Set DMA channel to be private

If async-tx is loaded before device drivers that requires imx-sdma, the
dmaengine_get() routine from async-tx grabs all non-private channels,
so devices that require DMA fail to work.

So mark imx-sdma with DMA_PRIVATE to avoid such situation.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 drivers/dma/imx-sdma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index b926abe4fa43a..b86cdab5c2683 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -2234,6 +2234,7 @@ static int sdma_probe(struct platform_device *pdev)
 	dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask);
 	dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask);
 	dma_cap_set(DMA_MEMCPY, sdma->dma_device.cap_mask);
+	dma_cap_set(DMA_PRIVATE, sdma->dma_device.cap_mask);
 
 	INIT_LIST_HEAD(&sdma->dma_device.channels);
 	/* Initialize channel parameters */
-- 
2.34.1