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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-06 19:20:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-06 19:20:54 -0700
commitf72e24a1240b78f421649c4d88f5c24ab1c896a1 (patch)
tree90bed3bf33ae0abf5636dafcc3eda3cc354612b0 /arch/arm64/mm
parentMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux (diff)
parentARM: dma-mapping: Remove traces of NOMMU code (diff)
downloadlinux-dev-f72e24a1240b78f421649c4d88f5c24ab1c896a1.tar.xz
linux-dev-f72e24a1240b78f421649c4d88f5c24ab1c896a1.zip
Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping infrastructure from Christoph Hellwig: "This is the first pull request for the new dma-mapping subsystem In this new subsystem we'll try to properly maintain all the generic code related to dma-mapping, and will further consolidate arch code into common helpers. This pull request contains: - removal of the DMA_ERROR_CODE macro, replacing it with calls to ->mapping_error so that the dma_map_ops instances are more self contained and can be shared across architectures (me) - removal of the ->set_dma_mask method, which duplicates the ->dma_capable one in terms of functionality, but requires more duplicate code. - various updates for the coherent dma pool and related arm code (Vladimir) - various smaller cleanups (me)" * tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping: (56 commits) ARM: dma-mapping: Remove traces of NOMMU code ARM: NOMMU: Set ARM_DMA_MEM_BUFFERABLE for M-class cpus ARM: NOMMU: Introduce dma operations for noMMU drivers: dma-mapping: allow dma_common_mmap() for NOMMU drivers: dma-coherent: Introduce default DMA pool drivers: dma-coherent: Account dma_pfn_offset when used with device tree dma: Take into account dma_pfn_offset dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs dma-mapping: remove dmam_free_noncoherent crypto: qat - avoid an uninitialized variable warning au1100fb: remove a bogus dma_free_nonconsistent call MAINTAINERS: add entry for dma mapping helpers powerpc: merge __dma_set_mask into dma_set_mask dma-mapping: remove the set_dma_mask method powerpc/cell: use the dma_supported method for ops switching powerpc/cell: clean up fixed mapping dma_ops initialization tile: remove dma_supported and mapping_error methods xen-swiotlb: remove xen_swiotlb_set_dma_mask arm: implement ->dma_supported instead of ->set_dma_mask mips/loongson64: implement ->dma_supported instead of ->set_dma_mask ...
Diffstat (limited to 'arch/arm64/mm')
-rw-r--r--arch/arm64/mm/dma-mapping.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 3e340b625436..e90cd1db42a8 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -175,7 +175,6 @@ static void *__dma_alloc(struct device *dev, size_t size,
no_map:
__dma_free_coherent(dev, size, ptr, *dma_handle, attrs);
no_mem:
- *dma_handle = DMA_ERROR_CODE;
return NULL;
}
@@ -478,7 +477,7 @@ static dma_addr_t __dummy_map_page(struct device *dev, struct page *page,
enum dma_data_direction dir,
unsigned long attrs)
{
- return DMA_ERROR_CODE;
+ return 0;
}
static void __dummy_unmap_page(struct device *dev, dma_addr_t dev_addr,