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authorLinus Torvalds <torvalds@linux-foundation.org>2019-10-26 06:29:04 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2019-10-26 06:29:04 -0400
commit964f9cfaaee31588b1f1a23edee8bed94136452a (patch)
tree613d766a3f3b1e76576be242ea8bb25b5d1c3c08 /drivers
parent485fc4b69cd28f295947535175c147b943b0b2e4 (diff)
parent9c24eaf81cc44d4bb38081c99eafd72ed85cf7f3 (diff)
downloadlinux-964f9cfaaee31588b1f1a23edee8bed94136452a.tar.bz2
Merge tag 'dma-mapping-5.4-2' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fix from Christoph Hellwig: "Fix a regression in the intel-iommu get_required_mask conversion (Arvind Sankar)" * tag 'dma-mapping-5.4-2' of git://git.infradead.org/users/hch/dma-mapping: iommu/vt-d: Return the correct dma mask when we are bypassing the IOMMU
Diffstat (limited to 'drivers')
-rw-r--r--drivers/iommu/intel-iommu.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 3f974919d3bd..79e35b3180ac 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3471,7 +3471,7 @@ static bool iommu_need_mapping(struct device *dev)
if (dev->coherent_dma_mask && dev->coherent_dma_mask < dma_mask)
dma_mask = dev->coherent_dma_mask;
- if (dma_mask >= dma_get_required_mask(dev))
+ if (dma_mask >= dma_direct_get_required_mask(dev))
return false;
/*
@@ -3775,6 +3775,13 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele
return nelems;
}
+static u64 intel_get_required_mask(struct device *dev)
+{
+ if (!iommu_need_mapping(dev))
+ return dma_direct_get_required_mask(dev);
+ return DMA_BIT_MASK(32);
+}
+
static const struct dma_map_ops intel_dma_ops = {
.alloc = intel_alloc_coherent,
.free = intel_free_coherent,
@@ -3787,6 +3794,7 @@ static const struct dma_map_ops intel_dma_ops = {
.dma_supported = dma_direct_supported,
.mmap = dma_common_mmap,
.get_sgtable = dma_common_get_sgtable,
+ .get_required_mask = intel_get_required_mask,
};
static void