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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>
This commit is contained in:
Mauricio Faria de Oliveira 2016-10-11 13:54:17 -07:00 committed by Linus Torvalds
parent a9a62c9384
commit af8a24988e
1 changed files with 4 additions and 2 deletions
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6
arch/powerpc/kernel/iommu.c
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@ -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);