From 3828ecaa1d5c55b4ed7522079e1a66a899f70d98 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Tue, 4 Nov 2014 12:42:48 +0200 Subject: [PATCH] mmc: sdhci-pci: Add 64-bit DMA support Set a 64-bit DMA mask when using 64-bit DMA. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci-pci.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c index 61192973e7cb..c25639b839cd 100644 --- a/drivers/mmc/host/sdhci-pci.c +++ b/drivers/mmc/host/sdhci-pci.c @@ -1064,7 +1064,7 @@ static int sdhci_pci_enable_dma(struct sdhci_host *host) { struct sdhci_pci_slot *slot; struct pci_dev *pdev; - int ret; + int ret = -1; slot = sdhci_priv(host); pdev = slot->chip->pdev; @@ -1076,7 +1076,17 @@ static int sdhci_pci_enable_dma(struct sdhci_host *host) "doesn't fully claim to support it.\n"); } - ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (host->flags & SDHCI_USE_64_BIT_DMA) { + if (host->quirks2 & SDHCI_QUIRK2_BROKEN_64_BIT_DMA) { + host->flags &= ~SDHCI_USE_64_BIT_DMA; + } else { + ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + if (ret) + dev_warn(&pdev->dev, "Failed to set 64-bit DMA mask\n"); + } + } + if (ret) + ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (ret) return ret; -- 2.30.2