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| author | Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> | 2016-10-11 13:54:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-11 15:06:32 -0700 |
| commit | af8a24988e48f9ed20acf4d5230ac216d5baf723 (patch) | |
| tree | 9229045b7c329b10df9c83b95c4cb8f86fd4654a | |
| parent | a9a62c9384417545620aee1b5ad1d9357350c17a (diff) | |
| download | linux-stable-af8a24988e48f9ed20acf4d5230ac216d5baf723.tar.gz linux-stable-af8a24988e48f9ed20acf4d5230ac216d5baf723.tar.bz2 linux-stable-af8a24988e48f9ed20acf4d5230ac216d5baf723.zip | |
powerpc: implement the DMA_ATTR_NO_WARN attribute
Add support for the DMA_ATTR_NO_WARN attribute on powerpc iommu code.
Link: http://lkml.kernel.org/r/1470092390-25451-3-git-send-email-mauricfo@linux.vnet.ibm.com
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/powerpc/kernel/iommu.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 37d6e741be82..5f202a566ec5 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -479,7 +479,8 @@ int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl, /* Handle failure */ if (unlikely(entry == DMA_ERROR_CODE)) { - if (printk_ratelimit()) + if (!(attrs & DMA_ATTR_NO_WARN) && + printk_ratelimit()) dev_info(dev, "iommu_alloc failed, tbl %p " "vaddr %lx npages %lu\n", tbl, vaddr, npages); @@ -776,7 +777,8 @@ dma_addr_t iommu_map_page(struct device *dev, struct iommu_table *tbl, mask >> tbl->it_page_shift, align, attrs); if (dma_handle == DMA_ERROR_CODE) { - if (printk_ratelimit()) { + if (!(attrs & DMA_ATTR_NO_WARN) && + printk_ratelimit()) { dev_info(dev, "iommu_alloc failed, tbl %p " "vaddr %p npages %d\n", tbl, vaddr, npages); |