[PATCH v6 15/19] swiotlb-xen: call dma_capable only if dev->dma_mask is allocated
From: Stefano Stabellini <hidden>
Date: 2013-09-27 16:36:00
Also in:
lkml, xen-devel
Subsystem:
the rest, xen hypervisor interface, xen swiotlb subsystem · Maintainers:
Linus Torvalds, Juergen Gross, Stefano Stabellini
Signed-off-by: Stefano Stabellini <redacted> --- drivers/xen/swiotlb-xen.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 790c2eb..3011736 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c@@ -512,7 +512,7 @@ dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, * buffering it. */ if (!xen_feature(XENFEAT_auto_translated_physmap) && - dma_capable(dev, dev_addr, size) && + dev->dma_mask && dma_capable(dev, dev_addr, size) && !range_straddles_page_boundary(phys, size) && !swiotlb_force) return dev_addr;
@@ -532,7 +532,7 @@ dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, /* * Ensure that the address returned is DMA'ble */ - if (!dma_capable(dev, dev_addr, size)) { + if (dev->dma_mask && !dma_capable(dev, dev_addr, size)) { swiotlb_tbl_unmap_single(dev, map, size, dir); dev_addr = 0; }
@@ -660,7 +660,7 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, if (swiotlb_force || xen_feature(XENFEAT_auto_translated_physmap) || - !dma_capable(hwdev, dev_addr, sg->length) || + (hwdev->dma_mask && !dma_capable(hwdev, dev_addr, sg->length)) || range_straddles_page_boundary(paddr, sg->length)) { /* * Pass the dma_addr of the first slab in the iotlb buffer as
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1.7.2.5