On 07/05/2018 17:11, Tony Krowiak wrote:
Introduces a new AP device driver. This device driver
is built on the VFIO mediated device framework. The framework
provides sysfs interfaces that facilitate passthrough
access by guests to devices installed on the linux host.
...snip...
+static int vfio_ap_matrix_dev_create(void)
+{
+ int ret;
+
+ vfio_ap_root_device = root_device_register(VFIO_AP_ROOT_NAME);
+
+ if (IS_ERR(vfio_ap_root_device)) {
+ ret = PTR_ERR(vfio_ap_root_device);
+ goto done;
+ }
+
+ ap_matrix = kzalloc(sizeof(*ap_matrix), GFP_KERNEL);
+ if (!ap_matrix) {
+ ret = -ENOMEM;
+ goto matrix_alloc_err;
+ }
+
+ ap_matrix->device.type = &vfio_ap_dev_type;
+ dev_set_name(&ap_matrix->device, "%s", VFIO_AP_DEV_NAME);
+ ap_matrix->device.parent = vfio_ap_root_device;
+ ap_matrix->device.release = vfio_ap_matrix_dev_release;
+ ap_matrix->device.driver = &vfio_ap_drv.driver;
+
+ ret = device_register(&ap_matrix->device);
+ if (ret)
+ goto matrix_reg_err;
+
+ goto done;
+
+matrix_reg_err:
+ put_device(&ap_matrix->device);
Did not see this before but here you certainly want to
do a kfree and not a put_device.
+
+matrix_alloc_err:
+ root_device_unregister(vfio_ap_root_device);
+
+done:
+ return ret;
+}
+
+static void vfio_ap_matrix_dev_destroy(struct ap_matrix *ap_matrix)
+{
+ device_unregister(&ap_matrix->device);
+ root_device_unregister(vfio_ap_root_device);
Also here you need a kfree(ap_matrix) too .
Pierre
--
Pierre Morel
Linux/KVM/QEMU in Böblingen - Germany
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