path: root/include/linux/dma-mapping.h
diff options
authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2010-09-22 13:04:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-09-22 17:22:38 -0700
commit710224fa2750cf449c02dd115548acebfdd2c86a (patch)
tree3caa498384daec3b2e40adb4a89d7f854f2adb7c /include/linux/dma-mapping.h
parent/proc/vmcore: fix seeking (diff)
arm: fix "arm: fix pci_set_consistent_dma_mask for dmabounce devices"
This fixes the regression caused by the commit 6fee48cd330c68 ("dma-mapping: arm: use generic pci_set_dma_mask and pci_set_consistent_dma_mask"). ARM needs to clip the dma coherent mask for dmabounce devices. This restores the old trick. Note that strictly speaking, the DMA API doesn't allow architectures to do such but I'm not sure it's worth adding the new API to set the dma mask that allows architectures to clip it. Reported-by: Krzysztof Halasa <khc@pm.waw.pl> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index ce29b8151198..ba8319ae5fcc 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -102,6 +102,9 @@ static inline u64 dma_get_mask(struct device *dev)
return DMA_BIT_MASK(32);
+int dma_set_coherent_mask(struct device *dev, u64 mask);
static inline int dma_set_coherent_mask(struct device *dev, u64 mask)
if (!dma_supported(dev, mask))
@@ -109,6 +112,7 @@ static inline int dma_set_coherent_mask(struct device *dev, u64 mask)
dev->coherent_dma_mask = mask;
return 0;
extern u64 dma_get_required_mask(struct device *dev);