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[1/2] Input: yealink - use driver core to instantiate device attributes

Message ID 20240710234855.311366-1-dmitry.torokhov@gmail.com
State Accepted
Commit 295b89a631fe2935d268a95a9dea284992a7a27d
Headers show
Series [1/2] Input: yealink - use driver core to instantiate device attributes | expand

Commit Message

Dmitry Torokhov July 10, 2024, 11:48 p.m. UTC 
Instead of manually creating driver-specific device attributes
set struct usb_driver->dev_groups pointer to have the driver core
do it.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/misc/yealink.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

Comments

Greg Kroah-Hartman July 11, 2024, 7:42 a.m. UTC | #1 
On Wed, Jul 10, 2024 at 04:48:54PM -0700, Dmitry Torokhov wrote:
> The locking rules in the driver came from era when sysfs attributes
> could live past the point of time when device would be unbound from
> the driver, and so used module-global semaphore (potentially shared
> between multiple yealink devices). Thankfully these times are long
> gone and attributes will not be accessible once they are removed.
> 
> Simplify the logic by moving to per-device mutex, stop checking if
> there is driver data instance attached to the interface, and use
> guard notation to acquire the mutex.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff mbox series

Patch

diff --git a/drivers/input/misc/yealink.c b/drivers/input/misc/yealink.c
index c3221b960a75..435a46baad9d 100644
--- a/drivers/input/misc/yealink.c
+++ b/drivers/input/misc/yealink.c
@@ -771,7 +771,7 @@  static DEVICE_ATTR(show_icon	, _M220, NULL		, show_icon	);
 static DEVICE_ATTR(hide_icon	, _M220, NULL		, hide_icon	);
 static DEVICE_ATTR(ringtone	, _M220, NULL		, store_ringtone);
 
-static struct attribute *yld_attributes[] = {
+static struct attribute *yld_attrs[] = {
 	&dev_attr_line1.attr,
 	&dev_attr_line2.attr,
 	&dev_attr_line3.attr,
@@ -782,10 +782,7 @@  static struct attribute *yld_attributes[] = {
 	&dev_attr_ringtone.attr,
 	NULL
 };
-
-static const struct attribute_group yld_attr_group = {
-	.attrs = yld_attributes
-};
+ATTRIBUTE_GROUPS(yld);
 
 /*******************************************************************************
  * Linux interface and usb initialisation
@@ -842,7 +839,6 @@  static void usb_disconnect(struct usb_interface *intf)
 
 	down_write(&sysfs_rwsema);
 	yld = usb_get_intfdata(intf);
-	sysfs_remove_group(&intf->dev.kobj, &yld_attr_group);
 	usb_set_intfdata(intf, NULL);
 	up_write(&sysfs_rwsema);
 
@@ -975,8 +971,6 @@  static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	store_line3(&intf->dev, NULL,
 			DRIVER_VERSION, sizeof(DRIVER_VERSION));
 
-	/* Register sysfs hooks (don't care about failure) */
-	ret = sysfs_create_group(&intf->dev.kobj, &yld_attr_group);
 	return 0;
 }
 
@@ -985,6 +979,7 @@  static struct usb_driver yealink_driver = {
 	.probe		= usb_probe,
 	.disconnect	= usb_disconnect,
 	.id_table	= usb_table,
+	.dev_groups	= yld_groups,
 };
 
 module_usb_driver(yealink_driver);