Commit dbdd7476 authored Dec 10, 2014 by David Vrabel

Revert "swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single"



This reverts commit 2c3fc8d2.

This commit broke on x86 PV because entries in the generic SWIOTLB are
indexed using (pseudo-)physical address not DMA address and these are
not the same in a x86 PV guest.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

parent 76f0a486

drivers/xen/swiotlb-xen.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -451,7 +451,7 @@ static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr,

		/* NOTE: We use dev_addr here, not paddr! */
		if (is_xen_swiotlb_buffer(dev_addr)) {
		swiotlb_tbl_unmap_single(hwdev, dev_addr, size, dir);
		swiotlb_tbl_unmap_single(hwdev, paddr, size, dir);
		return;
		}