return ret;
}
+/*
+ * Returns the positive number of pfns successfully obtained or a negative
+ * error code.
+ */
static int vaddr_get_pfn(struct mm_struct *mm, unsigned long vaddr,
int prot, unsigned long *pfn)
{
page, NULL, NULL);
if (ret == 1) {
*pfn = page_to_pfn(page[0]);
- ret = 0;
goto done;
}
if (ret == -EAGAIN)
goto retry;
- if (!ret && !is_invalid_reserved_pfn(*pfn))
- ret = -EFAULT;
+ if (!ret) {
+ if (is_invalid_reserved_pfn(*pfn))
+ ret = 1;
+ else
+ ret = -EFAULT;
+ }
}
done:
mmap_read_unlock(mm);
return -ENODEV;
ret = vaddr_get_pfn(current->mm, vaddr, dma->prot, pfn_base);
- if (ret)
+ if (ret < 0)
return ret;
pinned++;
for (vaddr += PAGE_SIZE, iova += PAGE_SIZE; pinned < npage;
pinned++, vaddr += PAGE_SIZE, iova += PAGE_SIZE) {
ret = vaddr_get_pfn(current->mm, vaddr, dma->prot, &pfn);
- if (ret)
+ if (ret < 0)
break;
if (pfn != *pfn_base + pinned ||
ret = vfio_lock_acct(dma, lock_acct, false);
unpin_out:
- if (ret) {
+ if (ret < 0) {
if (!rsvd) {
for (pfn = *pfn_base ; pinned ; pfn++, pinned--)
put_pfn(pfn, dma->prot);
return -ENODEV;
ret = vaddr_get_pfn(mm, vaddr, dma->prot, pfn_base);
- if (!ret && do_accounting && !is_invalid_reserved_pfn(*pfn_base)) {
+ if (ret == 1 && do_accounting && !is_invalid_reserved_pfn(*pfn_base)) {
ret = vfio_lock_acct(dma, 1, true);
if (ret) {
put_pfn(*pfn_base, dma->prot);