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authorChristoph Hellwig <hch@lst.de>2019-11-19 19:38:58 +0300
committerChristoph Hellwig <hch@lst.de>2019-11-20 22:31:41 +0300
commit68a33b1794665ba8a1d1ef1d3bfcc7c587d380a6 (patch)
treefa623a6dfd451c161630422aafd0bec2fe486285 /kernel/dma
parent4268ac6ae5870af10a7417b22990d615f72f77e2 (diff)
downloadlinux-68a33b1794665ba8a1d1ef1d3bfcc7c587d380a6.tar.xz
dma-direct: exclude dma_direct_map_resource from the min_low_pfn check
The valid memory address check in dma_capable only makes sense when mapping normal memory, not when using dma_map_resource to map a device resource. Add a new boolean argument to dma_capable to exclude that check for the dma_map_resource case. Fixes: b12d66278dd6 ("dma-direct: check for overflows on 32 bit DMA addresses") Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to 'kernel/dma')
-rw-r--r--kernel/dma/direct.c4
-rw-r--r--kernel/dma/swiotlb.c2
2 files changed, 3 insertions, 3 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index a479bd2d1e8b..40f1f0aac4b1 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -363,7 +363,7 @@ static inline bool dma_direct_possible(struct device *dev, dma_addr_t dma_addr,
size_t size)
{
return swiotlb_force != SWIOTLB_FORCE &&
- dma_capable(dev, dma_addr, size);
+ dma_capable(dev, dma_addr, size, true);
}
dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
@@ -412,7 +412,7 @@ dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr,
{
dma_addr_t dma_addr = paddr;
- if (unlikely(!dma_capable(dev, dma_addr, size))) {
+ if (unlikely(!dma_capable(dev, dma_addr, size, false))) {
report_addr(dev, dma_addr, size);
return DMA_MAPPING_ERROR;
}
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 673a2cdb2656..9280d6f8271e 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -678,7 +678,7 @@ bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr,
/* Ensure that the address returned is DMA'ble */
*dma_addr = __phys_to_dma(dev, *phys);
- if (unlikely(!dma_capable(dev, *dma_addr, size))) {
+ if (unlikely(!dma_capable(dev, *dma_addr, size, true))) {
swiotlb_tbl_unmap_single(dev, *phys, size, size, dir,
attrs | DMA_ATTR_SKIP_CPU_SYNC);
return false;