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authorPierre Ossman <drzeus@drzeus.cx>2008-07-04 12:51:20 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-04 10:44:49 -0700
commitbf5b1935d8e42b36a34645788eb261461fe07f2e (patch)
treebef08cc990a9dd83a515befc4939165acfb3d54a
parent46b6d94eb04a718730c73b83db889341aad0515e (diff)
mmc: don't use DMA on newer ENE controllers
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 <drzeus@drzeus.cx> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/mmc/host/sdhci.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 2b3f06a024f..b413aa6c246 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -119,7 +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,
},
{
@@ -128,7 +129,8 @@ 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,
},
{