[PATCH 2/3] powerpc: implement the DMA_ATTR_NO_WARN attribute
From: Mauricio Faria de Oliveira <hidden>
Date: 2016-08-01 23:05:14
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Add support for the DMA_ATTR_NO_WARN attribute on powerpc iommu code. Signed-off-by: Mauricio Faria de Oliveira <redacted> --- 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 37d6e74..5f202a5 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);
--
1.8.3.1