Re: [PATCH v2 8/9] xen/gntdev: Implement dma-buf import functionality

[Oleksandr Andrushchenko <andr2000@gmail.com>]

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;
>> +}
>> +