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Revert "swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single"

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commit dbdd74763f upstream.

This reverts commit 2c3fc8d26d.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Vrabel 2014-12-10 14:48:43 +00:00 committed by Greg Kroah-Hartman
parent 1e7b244364
commit 34dcc70b3e
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/swiotlb-xen.c
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@ -390,7 +390,7 @@ 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;
}