On 06/05/2018 01:28 AM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
/* ------------------------------------------------------------------ */
+static int
+dmabuf_imp_grant_foreign_access(struct page **pages, u32 *refs,
+ int count, int domid)
+{
+ grant_ref_t priv_gref_head;
+ int i, ret;
+
+ ret = gnttab_alloc_grant_references(count, &priv_gref_head);
+ if (ret < 0) {
+ pr_err("Cannot allocate grant references, ret %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < count; i++) {
+ int cur_ref;
+
+ cur_ref = gnttab_claim_grant_reference(&priv_gref_head);
+ if (cur_ref < 0) {
+ ret = cur_ref;
+ pr_err("Cannot claim grant reference, ret %d\n", ret);
+ goto out;
+ }
+
+ gnttab_grant_foreign_access_ref(cur_ref, domid,
+ xen_page_to_gfn(pages[i]), 0);
+ refs[i] = cur_ref;
+ }
+
+ ret = 0;
return 0?
My bad, thank you
+
+out:
+ gnttab_free_grant_references(priv_gref_head);
+ return ret;
+}
+
