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USB: usbip: convert to use dev_groups 

USB drivers now support the ability for the driver core to handle the
creation and removal of device-specific sysfs files in a race-free
manner.  Take advantage of that by converting the driver to use this by
moving the sysfs attributes into a group and assigning the dev_groups
pointer to it.

Cc: Valentina Manea <valentina.manea.m@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Link: https://lore.kernel.org/r/20190806144502.17792-13-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2019-08-06 16:45:02 +02:00
parent e605c30977
commit c5501d23e3
1 changed files with 8 additions and 42 deletions
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50
drivers/usb/usbip/stub_dev.c
View File

@ -106,38 +106,13 @@ err:
}
static DEVICE_ATTR_WO(usbip_sockfd);
static int stub_add_files(struct device *dev)
{
int err = 0;
err = device_create_file(dev, &dev_attr_usbip_status);
if (err)
goto err_status;
err = device_create_file(dev, &dev_attr_usbip_sockfd);
if (err)
goto err_sockfd;
err = device_create_file(dev, &dev_attr_usbip_debug);
if (err)
goto err_debug;
return 0;
err_debug:
device_remove_file(dev, &dev_attr_usbip_sockfd);
err_sockfd:
device_remove_file(dev, &dev_attr_usbip_status);
err_status:
return err;
}
static void stub_remove_files(struct device *dev)
{
device_remove_file(dev, &dev_attr_usbip_status);
device_remove_file(dev, &dev_attr_usbip_sockfd);
device_remove_file(dev, &dev_attr_usbip_debug);
}
static struct attribute *usbip_attrs[] = {
&dev_attr_usbip_status.attr,
&dev_attr_usbip_sockfd.attr,
&dev_attr_usbip_debug.attr,
NULL,
};
ATTRIBUTE_GROUPS(usbip);
static void stub_shutdown_connection(struct usbip_device *ud)
{
@ -379,17 +354,8 @@ static int stub_probe(struct usb_device *udev)
goto err_port;
}
rc = stub_add_files(&udev->dev);
if (rc) {
dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid);
goto err_files;
}
return 0;
err_files:
usb_hub_release_port(udev->parent, udev->portnum,
(struct usb_dev_state *) udev);
err_port:
dev_set_drvdata(&udev->dev, NULL);
usb_put_dev(udev);
@ -457,7 +423,6 @@ static void stub_disconnect(struct usb_device *udev)
/*
* NOTE: rx/tx threads are invoked for each usb_device.
*/
stub_remove_files(&udev->dev);
/* release port */
rc = usb_hub_release_port(udev->parent, udev->portnum,
@ -526,4 +491,5 @@ struct usb_device_driver stub_driver = {
.resume = stub_resume,
#endif
.supports_autosuspend = 0,
.dev_groups = usbip_groups,
};