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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>
Pierre Ossman 17 年之前
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共有 1 个文件被更改,包括 4 次插入2 次删除
  1. 4 2
      drivers/mmc/host/sdhci.c

+ 4 - 2
drivers/mmc/host/sdhci.c

@@ -119,7 +119,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
 		.subvendor      = PCI_ANY_ID,
 		.subvendor      = PCI_ANY_ID,
 		.subdevice      = PCI_ANY_ID,
 		.subdevice      = PCI_ANY_ID,
 		.driver_data    = SDHCI_QUIRK_SINGLE_POWER_WRITE |
 		.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,
 		.subvendor      = PCI_ANY_ID,
 		.subdevice      = PCI_ANY_ID,
 		.subdevice      = PCI_ANY_ID,
 		.driver_data    = SDHCI_QUIRK_SINGLE_POWER_WRITE |
 		.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,
 	},
 	},
 
 
 	{
 	{