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USB: usbsevseg: 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.

Link: https://lore.kernel.org/r/20190806144502.17792-12-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2019-08-06 16:45:01 +02:00
parent f9bbcbef0c
commit a21350feb9
1 changed files with 3 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/usb/misc/usbsevseg.c
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@ -316,7 +316,7 @@ MYDEV_ATTR_SIMPLE_UNSIGNED(powered, update_display_powered);
MYDEV_ATTR_SIMPLE_UNSIGNED(mode_msb, update_display_mode);
MYDEV_ATTR_SIMPLE_UNSIGNED(mode_lsb, update_display_mode);
static struct attribute *dev_attrs[] = {
static struct attribute *sevseg_attrs[] = {
&dev_attr_powered.attr,
&dev_attr_text.attr,
&dev_attr_textmode.attr,
@ -325,10 +325,7 @@ static struct attribute *dev_attrs[] = {
&dev_attr_mode_lsb.attr,
NULL
};
static const struct attribute_group dev_attr_grp = {
.attrs = dev_attrs,
};
ATTRIBUTE_GROUPS(sevseg);
static int sevseg_probe(struct usb_interface *interface,
const struct usb_device_id *id)
@ -354,17 +351,9 @@ static int sevseg_probe(struct usb_interface *interface,
mydev->mode_msb = 0x06; /* 6 characters */
mydev->mode_lsb = 0x3f; /* scanmode for 6 chars */
rc = sysfs_create_group(&interface->dev.kobj, &dev_attr_grp);
if (rc)
goto error;
dev_info(&interface->dev, "USB 7 Segment device now attached\n");
return 0;
error:
usb_set_intfdata(interface, NULL);
usb_put_dev(mydev->udev);
kfree(mydev);
error_mem:
return rc;
}
@ -374,7 +363,6 @@ static void sevseg_disconnect(struct usb_interface *interface)
struct usb_sevsegdev *mydev;
mydev = usb_get_intfdata(interface);
sysfs_remove_group(&interface->dev.kobj, &dev_attr_grp);
usb_set_intfdata(interface, NULL);
usb_put_dev(mydev->udev);
kfree(mydev);
@ -423,6 +411,7 @@ static struct usb_driver sevseg_driver = {
.resume = sevseg_resume,
.reset_resume = sevseg_reset_resume,
.id_table = id_table,
.dev_groups = sevseg_groups,
.supports_autosuspend = 1,
};