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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-29 08:50:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-29 08:50:14 -0700 |
| commit | 9ae2a143081fa8fba5042431007b33d9a855b7a2 (patch) | |
| tree | 5c0bdc32eaa7b323059cbf2dab1aa96a5141309a /kernel/dma/direct.c | |
| parent | 37fcacb50be7071d146144a6c5c5bf0194b9a1cf (diff) | |
| parent | 8ddde07a3d285a0f3cec14924446608320fdc013 (diff) | |
Merge tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig:
- do not zero buffer in set_memory_decrypted (Kirill A. Shutemov)
- fix return value of dma-debug __setup handlers (Randy Dunlap)
- swiotlb cleanups (Robin Murphy)
- remove most remaining users of the pci-dma-compat.h API
(Christophe JAILLET)
- share the ABI header for the DMA map_benchmark with userspace
(Tian Tao)
- update the maintainer for DMA MAPPING BENCHMARK (Xiang Chen)
- remove CONFIG_DMA_REMAP (me)
* tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mapping:
dma-mapping: benchmark: extract a common header file for map_benchmark definition
dma-debug: fix return value of __setup handlers
dma-mapping: remove CONFIG_DMA_REMAP
media: v4l2-pci-skeleton: Remove usage of the deprecated "pci-dma-compat.h" API
rapidio/tsi721: Remove usage of the deprecated "pci-dma-compat.h" API
sparc: Remove usage of the deprecated "pci-dma-compat.h" API
agp/intel: Remove usage of the deprecated "pci-dma-compat.h" API
alpha: Remove usage of the deprecated "pci-dma-compat.h" API
MAINTAINERS: update maintainer list of DMA MAPPING BENCHMARK
swiotlb: simplify array allocation
swiotlb: tidy up includes
swiotlb: simplify debugfs setup
swiotlb: do not zero buffer in set_memory_decrypted()
Diffstat (limited to 'kernel/dma/direct.c')
| -rw-r--r-- | kernel/dma/direct.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 50f48e9e4598..35a1d29d6a2e 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -265,17 +265,13 @@ void *dma_direct_alloc(struct device *dev, size_t size, page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO); if (!page) return NULL; + + /* + * dma_alloc_contiguous can return highmem pages depending on a + * combination the cma= arguments and per-arch setup. These need to be + * remapped to return a kernel virtual address. + */ if (PageHighMem(page)) { - /* - * Depending on the cma= arguments and per-arch setup, - * dma_alloc_contiguous could return highmem pages. - * Without remapping there is no way to return them here, so - * log an error and fail. - */ - if (!IS_ENABLED(CONFIG_DMA_REMAP)) { - dev_info(dev, "Rejecting highmem page from CMA.\n"); - goto out_free_pages; - } remap = true; set_uncached = false; } @@ -349,7 +345,7 @@ void dma_direct_free(struct device *dev, size_t size, dma_free_from_pool(dev, cpu_addr, PAGE_ALIGN(size))) return; - if (IS_ENABLED(CONFIG_DMA_REMAP) && is_vmalloc_addr(cpu_addr)) { + if (is_vmalloc_addr(cpu_addr)) { vunmap(cpu_addr); } else { if (IS_ENABLED(CONFIG_ARCH_HAS_DMA_CLEAR_UNCACHED)) |