mmc: don't use DMA on newer ENE controllers (bf5b1935) · Commits · 戴 / test

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>

drivers/mmc/host/sdhci.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -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,
		},

		{

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