diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-04 12:51:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-07-24 09:14:11 -0700 |
| commit | c23d253e757a7514ec160fb7fdb0d3ba558b8f6a (patch) | |
| tree | 71e6c1e435b2624a4bd32f2966653da749e0cc17 | |
| parent | 4fa47616fec25ffc3e19ace5f3f06f4cd302d69e (diff) | |
| download | lwn-c23d253e757a7514ec160fb7fdb0d3ba558b8f6a.tar.gz lwn-c23d253e757a7514ec160fb7fdb0d3ba558b8f6a.zip | |
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 <drzeus@drzeus.cx>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 4b673aa2dc3c..e44e2bd403d7 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, }, { |