tree b43c852aa32cdb4f1c2377225d005576cc9c945c
parent 2b097e9bc3742d4ffc63fe64b8fd44242d662392
author Michael S. Tsirkin <mst@redhat.com> 1456673759 +0200
committer Paolo Bonzini <pbonzini@redhat.com> 1456911292 +0100

mips/kvm: fix ioctl error handling

Returning directly whatever copy_to_user(...) or copy_from_user(...)
returns may not do the right thing if there's a pagefault:
copy_to_user/copy_from_user return the number of bytes not copied in
this case, but ioctls need to return -EFAULT instead.

Fix up kvm on mips to do
	return copy_to_user(...)) ?  -EFAULT : 0;
and
	return copy_from_user(...)) ?  -EFAULT : 0;

everywhere.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>