Revert "swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single"

commit dbdd74763f1faf799fbb9ed30423182e92919378 upstream.

This reverts commit 2c3fc8d26dd09b9d7069687eead849ee81c78e46.

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>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index de37cc22b9a51c68aa099a7b49763a5d25244430..c9d0d5a0e66268b8467bf0bc1b0ac4b541669d93 100644 (file)
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -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;
        }