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xen/mm: return more precise error from xen_remap_domain_range()

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Callers of xen_remap_domain_range() need to know if the remap failed
because frame is currently paged out.  So they can retry the remap
later on.  Return -ENOENT in this case.

This assumes that the error codes returned by Xen are a subset of
those used by the kernel.  It is unclear if this is defined as part of
the hypercall ABI.

Acked-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
David Vrabel 2012-08-30 13:58:11 +01:00 committed by Konrad Rzeszutek Wilk
parent 6d7083eee3
commit 69870a8478
1 changed files with 2 additions and 2 deletions
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4
arch/x86/xen/mmu.c
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@ -2331,8 +2331,8 @@ int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
if (err)
goto out;
err = -EFAULT;
if (HYPERVISOR_mmu_update(mmu_update, batch, NULL, domid) < 0)
err = HYPERVISOR_mmu_update(mmu_update, batch, NULL, domid);
if (err < 0)
goto out;
nr -= batch;