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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>
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1 changed files with 4 additions and 2 deletions
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@ -479,7 +479,8 @@ int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl,
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/* Handle failure */
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if (unlikely(entry == DMA_ERROR_CODE)) {
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if (printk_ratelimit())
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if (!(attrs & DMA_ATTR_NO_WARN) &&
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printk_ratelimit())
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dev_info(dev, "iommu_alloc failed, tbl %p "
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"vaddr %lx npages %lu\n", tbl, vaddr,
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npages);
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@ -776,7 +777,8 @@ dma_addr_t iommu_map_page(struct device *dev, struct iommu_table *tbl,
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mask >> tbl->it_page_shift, align,
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attrs);
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if (dma_handle == DMA_ERROR_CODE) {
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if (printk_ratelimit()) {
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if (!(attrs & DMA_ATTR_NO_WARN) &&
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printk_ratelimit()) {
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dev_info(dev, "iommu_alloc failed, tbl %p "
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"vaddr %p npages %d\n", tbl, vaddr,
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npages);
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