virt: vbox: convert to use dev_groups

The driver core supports the ability to handle the creation and removal
of device-specific sysfs files in a race-free manner. Moreover, it can
guarantee the success of creation. Therefore, it should be better to
convert to use dev_groups.

Fixes: 0ba002bc4393 ("virt: Add vboxguest driver for Virtual Box Guest integration")
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20220901144610.3550300-1-jiasheng@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/virt/vboxguest/vboxguest_linux.c b/drivers/virt/vboxguest/vboxguest_linux.c
index 4ccfd30..6fc8134 100644 (file)
--- a/drivers/virt/vboxguest/vboxguest_linux.c
+++ b/drivers/virt/vboxguest/vboxguest_linux.c
@@ -270,6 +270,13 @@ static ssize_t host_features_show(struct device *dev,
 static DEVICE_ATTR_RO(host_version);
 static DEVICE_ATTR_RO(host_features);
 
+static struct attribute *vbg_pci_attrs[] = {
+       &dev_attr_host_version.attr,
+       &dev_attr_host_features.attr,
+       NULL,
+};
+ATTRIBUTE_GROUPS(vbg_pci);
+
 /**
  * Does the PCI detection and init of the device.
  *
@@ -390,8 +397,6 @@ static int vbg_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
        }
 
        pci_set_drvdata(pci, gdev);
-       device_create_file(dev, &dev_attr_host_version);
-       device_create_file(dev, &dev_attr_host_features);
 
        vbg_info("vboxguest: misc device minor %d, IRQ %d, I/O port %x, MMIO at %pap (size %pap)\n",
                 gdev->misc_device.minor, pci->irq, gdev->io_port,
@@ -422,8 +427,6 @@ static void vbg_pci_remove(struct pci_dev *pci)
        mutex_unlock(&vbg_gdev_mutex);
 
        free_irq(pci->irq, gdev);
-       device_remove_file(gdev->dev, &dev_attr_host_features);
-       device_remove_file(gdev->dev, &dev_attr_host_version);
        misc_deregister(&gdev->misc_device_user);
        misc_deregister(&gdev->misc_device);
        vbg_core_exit(gdev);
@@ -488,6 +491,7 @@ MODULE_DEVICE_TABLE(pci,  vbg_pci_ids);
 
 static struct pci_driver vbg_pci_driver = {
        .name           = DEVICE_NAME,
+       .dev_groups     = vbg_pci_groups,
        .id_table       = vbg_pci_ids,
        .probe          = vbg_pci_probe,
        .remove         = vbg_pci_remove,