From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Thu, 27 Jun 2013 12:45:16 +0000 (+0100)
Subject: DMA-API: dma: edma.c: no need to explicitly initialize DMA masks
X-Git-Tag: firefly_0821_release~176^2~4991^2~9
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=94cb0e7980e27b0a303074568de76080de06a693;p=firefly-linux-kernel-4.4.55.git

DMA-API: dma: edma.c: no need to explicitly initialize DMA masks

register_platform_device_full() can setup the DMA mask provided the
appropriate member is set in struct platform_device_info.  So lets
make that be the case.  This avoids a direct reference to the DMA
masks by this driver.

While here, add the dma_set_mask_and_coherent() call which the DMA API
requires DMA-using drivers to call.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index ff50ff4c6a57..fd5e48c29746 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -631,6 +631,10 @@ static int edma_probe(struct platform_device *pdev)
 	struct edma_cc *ecc;
 	int ret;
 
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
 	ecc = devm_kzalloc(&pdev->dev, sizeof(*ecc), GFP_KERNEL);
 	if (!ecc) {
 		dev_err(&pdev->dev, "Can't allocate controller\n");
@@ -702,11 +706,13 @@ static struct platform_device *pdev0, *pdev1;
 static const struct platform_device_info edma_dev_info0 = {
 	.name = "edma-dma-engine",
 	.id = 0,
+	.dma_mask = DMA_BIT_MASK(32),
 };
 
 static const struct platform_device_info edma_dev_info1 = {
 	.name = "edma-dma-engine",
 	.id = 1,
+	.dma_mask = DMA_BIT_MASK(32),
 };
 
 static int edma_init(void)
@@ -720,8 +726,6 @@ static int edma_init(void)
 			ret = PTR_ERR(pdev0);
 			goto out;
 		}
-		pdev0->dev.dma_mask = &pdev0->dev.coherent_dma_mask;
-		pdev0->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 	}
 
 	if (EDMA_CTLRS == 2) {
@@ -731,8 +735,6 @@ static int edma_init(void)
 			platform_device_unregister(pdev0);
 			ret = PTR_ERR(pdev1);
 		}
-		pdev1->dev.dma_mask = &pdev1->dev.coherent_dma_mask;
-		pdev1->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 	}
 
 out: