From 56e71efe44eb06ae1761f43cca70a5f3cc54c0fb Mon Sep 17 00:00:00 2001 From: Feng Tang Date: Sat, 29 Sep 2007 14:15:05 +0800 Subject: [PATCH] sdhci: remove DMA capability check from controller's PCI Class reg Many host controllers don't fully follow the PCI spec to claim whether they support DMA in PCI class register. Leave the driver to judge it from the Capability register, quirks and module parameter Signed-off-by: Feng Tang Signed-off-by: Pierre Ossman --- drivers/mmc/host/sdhci.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 317578d..866528c 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1299,13 +1299,18 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot) host->flags |= SDHCI_USE_DMA; } else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA) host->flags |= SDHCI_USE_DMA; - else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) - DBG("Controller doesn't have DMA interface\n"); else if (!(caps & SDHCI_CAN_DO_DMA)) DBG("Controller doesn't have DMA capability\n"); else host->flags |= SDHCI_USE_DMA; + if (((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) && + (host->flags & SDHCI_USE_DMA)) { + printk(KERN_WARNING "%s: Will use DMA " + "mode even though HW doesn't fully " + "claim to support it.\n", host->slot_descr); + } + if (host->flags & SDHCI_USE_DMA) { if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) { printk(KERN_WARNING "%s: No suitable DMA available. " -- 2.7.4