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KVM: do not release the error pfn

Browse source 
After commit a2766325cf, the error pfn is replaced by the
error code, it need not be released anymore

[ The patch has been compiling tested for powerpc ]

Signed-off-by: Xiao Guangrong <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
This commit is contained in:
Xiao Guangrong 2012-08-03 15:42:10 +08:00 • committed by Avi Kivity
commit cb9aaa30b1
6 changed files with 14 additions and 21 deletions
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1
virt/kvm/iommu.c
View file

@ -107,7 +107,6 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
*/
pfn = kvm_pin_pages(slot, gfn, page_size);
if (is_error_pfn(pfn)) {
kvm_release_pfn_clean(pfn);
gfn += 1;
continue;
}

16
virt/kvm/kvm_main.c
View file

@ -102,9 +102,6 @@ static bool largepages_enabled = true;
bool kvm_is_mmio_pfn(pfn_t pfn)
{
if (is_error_pfn(pfn))
return false;
if (pfn_valid(pfn)) {
int reserved;
struct page *tail = pfn_to_page(pfn);
@ -1165,11 +1162,14 @@ EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic);
static struct page *kvm_pfn_to_page(pfn_t pfn)
{
WARN_ON(kvm_is_mmio_pfn(pfn));
if (is_error_pfn(pfn) || kvm_is_mmio_pfn(pfn))
if (is_error_pfn(pfn))
return KVM_ERR_PTR_BAD_PAGE;
if (kvm_is_mmio_pfn(pfn)) {
WARN_ON(1);
return KVM_ERR_PTR_BAD_PAGE;
}
return pfn_to_page(pfn);
}
@ -1193,7 +1193,9 @@ EXPORT_SYMBOL_GPL(kvm_release_page_clean);
void kvm_release_pfn_clean(pfn_t pfn)
{
if (!is_error_pfn(pfn) && !kvm_is_mmio_pfn(pfn))
WARN_ON(is_error_pfn(pfn));
if (!kvm_is_mmio_pfn(pfn))
put_page(pfn_to_page(pfn));
}
EXPORT_SYMBOL_GPL(kvm_release_pfn_clean);