Commit af8a2498 authored Oct 11, 2016 by Mauricio Faria de Oliveira Committed by Linus Torvalds Oct 11, 2016

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>

parent a9a62c93

arch/powerpc/kernel/iommu.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -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);