The patch titled
Subject: powerpc: implement the DMA_ATTR_NO_WARN attribute
has been added to the -mm tree. Its filename is
powerpc-implement-the-dma_attr_no_warn-attribute.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-implement-the-dma_attr_no_warn-attribute.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-implement-the-dma_attr_no_warn-attribute.patch
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------------------------------------------------------
From: Mauricio Faria de Oliveira <mauricfo@xxxxxxxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxxxxxxx
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@xxxxxxxxxxxxxxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/kernel/iommu.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN arch/powerpc/kernel/iommu.c~powerpc-implement-the-dma_attr_no_warn-attribute arch/powerpc/kernel/iommu.c
--- a/arch/powerpc/kernel/iommu.c~powerpc-implement-the-dma_attr_no_warn-attribute
+++ a/arch/powerpc/kernel/iommu.c
@@ -479,7 +479,8 @@ int ppc_iommu_map_sg(struct device *dev,
/* 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
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);
_
Patches currently in -mm which might be from mauricfo@xxxxxxxxxxxxxxxxxx are
dma-mapping-introduce-the-dma_attr_no_warn-attribute.patch
powerpc-implement-the-dma_attr_no_warn-attribute.patch
nvme-use-the-dma_attr_no_warn-attribute.patch
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