Patchwork [32/51] DMA-API: mmc: sdhci-acpi: use dma_coerce_mask_and_coherent()

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Submitter Russell King
Date Sept. 19, 2013, 9:57 p.m.
Message ID <E1VMmDe-0007j6-Tj@rmk-PC.arm.linux.org.uk>
Download mbox | patch
Permalink /patch/276430/
State Not Applicable
Delegated to: David Miller
Headers show

Comments

Russell King - Sept. 19, 2013, 9:57 p.m.
The code sequence:
	dev->dma_mask = &dev->coherent_dma_mask;
	dev->coherent_dma_mask = dma_mask;
bypasses the architectures check on the DMA mask.  It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/mmc/host/sdhci-acpi.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index cdd4ce0..ef19874 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -310,8 +310,9 @@  static int sdhci_acpi_probe(struct platform_device *pdev)
 			dma_mask = DMA_BIT_MASK(32);
 		}
 
-		dev->dma_mask = &dev->coherent_dma_mask;
-		dev->coherent_dma_mask = dma_mask;
+		err = dma_coerce_mask_and_coherent(dev, dma_mask);
+		if (err)
+			goto err_free;
 	}
 
 	if (c->slot) {