Eric Lee / smarc-ti-linux-kernel

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Commit 840b131125d65757015dbe5d97d320654cf3da86

Authored by David Vrabel
Committed by Greg Kroah-Hartman
1 parent 34be58049a

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff

drivers/xen/swiotlb-xen.c
Diff comments   View file @ 840b131
... ... @@ -449,7 +449,7 @@
449 449  
450 450 /* NOTE: We use dev_addr here, not paddr! */
451 451 if (is_xen_swiotlb_buffer(dev_addr)) {
452   - swiotlb_tbl_unmap_single(hwdev, dev_addr, size, dir);
  452 + swiotlb_tbl_unmap_single(hwdev, paddr, size, dir);
453 453 return;
454 454 }
455 455