From mboxrd@z Thu Jan 1 00:00:00 1970 From: mauricfo@linux.vnet.ibm.com (Mauricio Faria de Oliveira) Date: Fri, 8 Jul 2016 09:27:08 -0300 Subject: [PATCH v3 3/3] powerpc: implement DMA_ATTR_NO_WARN In-Reply-To: <1467980828-5282-1-git-send-email-mauricfo@linux.vnet.ibm.com> References: <1467980828-5282-1-git-send-email-mauricfo@linux.vnet.ibm.com> Message-ID: <1467980828-5282-4-git-send-email-mauricfo@linux.vnet.ibm.com> Add support for the DMA_ATTR_NO_WARN attribute on powerpc iommu code. Signed-off-by: Mauricio Faria de Oliveira --- Changelog: v3: - powerpc: none v2: - all: address warnings from checkpatch.pl (line wrapping and typos) arch/powerpc/kernel/iommu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index a8e3490..f1e20ea 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 (unlikely(!dma_get_attr(DMA_ATTR_NO_WARN, attrs)) && + 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 (unlikely(!dma_get_attr(DMA_ATTR_NO_WARN, attrs)) && + printk_ratelimit()) { dev_info(dev, "iommu_alloc failed, tbl %p " "vaddr %p npages %d\n", tbl, vaddr, npages); -- 1.8.3.1