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dma-direct: exclude dma_direct_map_resource from the min_low_pfn check

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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: b12d66278d ("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>
This commit is contained in:
Christoph Hellwig
2019-11-19 17:38:58 +01:00
parent 4268ac6ae5
commit 68a33b1794
5 changed files with 10 additions and 9 deletions
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4
kernel/dma/direct.c
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@@ -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;
}