The DMA coherent allocator needs to take bus limits into account for picking the zone that the memory is allocated from.
Reported-by: Roger Quadros <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]> Tested-by: Peter Ujfalusi <[email protected]> Tested-by: Roger Quadros <[email protected]> --- arch/arm/mm/dma-mapping.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 72ddc3d0f5eb..87aba505554a 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -658,7 +658,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, pgprot_t prot, bool is_coherent, unsigned long attrs, const void *caller) { - u64 mask = dev->coherent_dma_mask; + u64 mask = min_not_zero(dev->coherent_dma_mask, dev->bus_dma_limit); struct page *page = NULL; void *addr; bool allowblock, cma; -- 2.24.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
