| commit | c884227eaae9936f8ecbde6e1387bccdab5f4e90 | |
| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | |
| Fri, 21 Nov 2014 11:10:39 +0000 (21 11:10 +0000) | ||
| committer | David Vrabel <david.vrabel@citrix.com> | |
| Thu, 4 Dec 2014 12:41:56 +0000 (4 12:41 +0000) | ||
| tree | a12fd8f936773ef95c601f9f1049c350c126a491 | treesnapshot (tar.gz zip) |
| parent | d6883e6f32e07ef2cc974753ba00927de099e6d7 | commitdiff |
swiotlb-xen: remove BUG_ON in xen_bus_to_phys
On x86 truncation cannot occur because config XEN depends on X86_64 ||
(X86_32 && X86_PAE).
On ARM truncation can occur without CONFIG_ARM_LPAE, when the dma
operation involves foreign grants. However in that case the physical
address returned by xen_bus_to_phys is actually invalid (there is no mfn
to pfn tracking for foreign grants on ARM) and it is not used.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: stable@vger.kernel.org
On x86 truncation cannot occur because config XEN depends on X86_64 ||
(X86_32 && X86_PAE).
On ARM truncation can occur without CONFIG_ARM_LPAE, when the dma
operation involves foreign grants. However in that case the physical
address returned by xen_bus_to_phys is actually invalid (there is no mfn
to pfn tracking for foreign grants on ARM) and it is not used.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: stable@vger.kernel.org
| drivers/xen/swiotlb-xen.c | diffblobblamehistory |