On 26.04.2017 12:08, Jean-Philippe Brucker wrote:
On 26/04/17 07:53, Tomasz Nowicki wrote:
+ mutex_lock(&device->tasks_lock);
+ list_for_each_entry(vfio_task, &device->tasks, list) {
+ if (vfio_task->pasid != svm.pasid)
+ continue;
+
+ ret = iommu_unbind_task(device->dev, svm.pasid, flags);
+ if (ret)
+ dev_warn(device->dev, "failed to unbind PASID %u\n",
+ vfio_task->pasid);
+
+ list_del(&vfio_task->list);
+ kfree(vfio_task);
Please use list_for_each_entry_safe.
There is:
+ break;
right after kfree, so we'd never follow vfio_task->list.next after freeing
vfio_task. The code searches for the _only_ task matching the PASID,
removes it and leaves the loop.
Ah right. Sorry for the noise.
Tomasz
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