On 05/03/18 21:44, Sinan Kaya wrote:
> On 2/12/2018 1:33 PM, Jean-Philippe Brucker wrote:
>> +static int iommu_queue_fault(struct iommu_domain *domain, struct device
>> *dev,
>> + struct iommu_fault_event *evt)
>> +{
>> + struct iommu_fault_group *group;
>> + struct iommu_fault_context *fault, *next;
>> +
>> + if (!iommu_fault_queue)
>> + return -ENOSYS;
>> +
>> + if (!evt->last_req) {
>> + fault = kzalloc(sizeof(*fault), GFP_KERNEL);
>> + if (!fault)
>> + return -ENOMEM;
>> +
>> + fault->evt = *evt;
>> + fault->dev = dev;
>> +
>> + /* Non-last request of a group. Postpone until the last one */
>> + spin_lock(&iommu_partial_faults_lock);
>> + list_add_tail(&fault->head, &iommu_partial_faults);
>> + spin_unlock(&iommu_partial_faults_lock);
>> +
>> + return IOMMU_PAGE_RESP_HANDLED;
>> + }
>> +
>> + group = kzalloc(sizeof(*group), GFP_KERNEL);
>> + if (!group)
>> + return -ENOMEM;
>
> Release the requests in iommu_partial_faults here.
We move these requests to the group->faults list (which btw should use
list_move instead of the current list_del+list_add) and we release them in
iommu_fault_handle_group()
Thanks,
Jean
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