linux-kernel - [PATCH] dmaengine: zynqmp_dma: Sync DMA and coherent masks

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Date:   Thu, 16 Mar 2023 15:03:18 +0530
From:   Harini Katakam <harini.katakam@....com>
To:     <vkoul@...nel.org>, <romain.perier@...il.com>,
        <allen.lkml@...il.com>, <yukuai3@...wei.com>
CC:     <dmaengine@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <harinikatakamlinux@...il.com>,
        <michal.simek@....com>, <harini.katakam@....com>,
        <radhey.shyam.pandey@....com>
Subject: [PATCH] dmaengine: zynqmp_dma: Sync DMA and coherent masks

Align ZDMA DMA as well as coherent memory masks to 44 bit. This is
required when using >32 bit memory regions.

Signed-off-by: Harini Katakam <harini.katakam@....com>
---
 drivers/dma/xilinx/zynqmp_dma.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c
index 3f4ee3954384..34d7d20ffc09 100644
--- a/drivers/dma/xilinx/zynqmp_dma.c
+++ b/drivers/dma/xilinx/zynqmp_dma.c
@@ -1051,7 +1051,11 @@ static int zynqmp_dma_probe(struct platform_device *pdev)
 	zdev->dev = &pdev->dev;
 	INIT_LIST_HEAD(&zdev->common.channels);
 
-	dma_set_mask(&pdev->dev, DMA_BIT_MASK(44));
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(44));
+	if (ret) {
+		dev_err(&pdev->dev, "DMA not available for address range\n");
+		return ret;
+	}
 	dma_cap_set(DMA_MEMCPY, zdev->common.cap_mask);
 
 	p = &zdev->common;
-- 
2.17.1