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Commit eaa21864 authored by Sahitya Tummala's avatar Sahitya Tummala Committed by Xiaonian Wang
Browse files

mmc: sdhci-msm: update dma_mask for SDHC device 



Set the dma_mask to 0xffffffff to indicate full 32-bit
address space and thus avoiding unnecessary buffers bouncing
from high to low memory.

Change-Id: Idaffe14d4e54a27b15e5a5d82dad41d843714d57
Signed-off-by: default avatarSahitya Tummala <stummala@codeaurora.org>
[xiaonian@codeaurora.org: fix trivial merge conflict]
Signed-off-by: default avatarXiaonian Wang <xiaonian@codeaurora.org>
parent 581df134

drivers/mmc/host/sdhci-msm.c

+8 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#include <linux/slab.h>

#include <linux/mmc/mmc.h>

#include <linux/mmc/slot-gpio.h>

#include <linux/dma-mapping.h>

#include <linux/msm-bus.h>



#include "sdhci-pltfm.h"
@@ -1793,6 +1794,13 @@ static int sdhci_msm_probe(struct platform_device *pdev) 
		}

	}



	if (dma_supported(mmc_dev(host->mmc), DMA_BIT_MASK(32))) {

		host->dma_mask = DMA_BIT_MASK(32);

		mmc_dev(host->mmc)->dma_mask = &host->dma_mask;

	} else {

		dev_err(&pdev->dev, "%s: Failed to set dma mask\n", __func__);

	}



	ret = sdhci_add_host(host);

	if (ret) {

		dev_err(&pdev->dev, "Add host failed (%d)\n", ret);