From: Pierre Ossman Date: Fri, 4 Jul 2008 10:51:20 +0000 (+0200) Subject: mmc: don't use DMA on newer ENE controllers X-Git-Tag: v2.6.25.12~3 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c23d253e757a7514ec160fb7fdb0d3ba558b8f6a;p=thirdparty%2Fkernel%2Fstable.git mmc: don't use DMA on newer ENE controllers commit bf5b1935d8e42b36a34645788eb261461fe07f2e upstream. Even the newer ENE controllers have bugs in their DMA engine that make it too dangerous to use. Disable it until someone has figured out under which conditions it corrupts data. This has caused problems at least once, and can be found as bug report 10925 in the kernel bugzilla. Signed-off-by: Pierre Ossman Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 4b673aa2dc3ca..e44e2bd403d7c 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -109,7 +109,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = { .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | - SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS, + SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS | + SDHCI_QUIRK_BROKEN_DMA, }, { @@ -118,7 +119,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = { .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | - SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS, + SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS | + SDHCI_QUIRK_BROKEN_DMA, }, {