Re: [PATCH v6 2/7] s390: ap: new vfio_ap_queue structure

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On 25/03/2019 09:05, Harald Freudenberger wrote:
On 22.03.19 15:43, Pierre Morel wrote:
The AP interruptions are assigned on a queue basis and
the GISA structure is handled on a VM basis, so that

...snip...

+ * vfio_ap_queue_dev_remove:
+ *
+ * Free the associated vfio_ap_queue structure
+ */
  static void vfio_ap_queue_dev_remove(struct ap_device *apdev)
  {
-	/* Nothing to do yet */
+	struct vfio_ap_queue *q;
+
+	q = dev_get_drvdata(&apdev->device);
I'd add a check if q != NULL here.

I wonder if this can ever happen.
However I added a check in the next patch.
I can move it here.

+	mutex_lock(&matrix_dev->lock);
+	list_del(&q->list);
+	mutex_unlock(&matrix_dev->lock);
+	kfree(q);
I would add a line:
     dev_set_drvdata(&apdev->device, NULL);

OK, I clean it before giving it back, fair.

Thanks.

Rgeards,
Pierre

--
Pierre Morel
Linux/KVM/QEMU in Böblingen - Germany




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