driver core: make struct device_type.uevent() take a const *

The uevent() callback in struct device_type should not be modifying the
device that is passed into it, so mark it as a const * and propagate the
function signature changes out into all relevant subsystems that use
this callback.

Cc: Alan Stern <[e-mail]>
Cc: Andreas Noever <[e-mail]>
Cc: Andy Shevchenko <[e-mail]>
Cc: Bard Liao <[e-mail]>
Cc: Chaitanya Kulkarni <[e-mail]>
Cc: Dan Williams <[e-mail]>
Cc: Dmitry Torokhov <[e-mail]>
Cc: Frank Rowand <[e-mail]>
Cc: Ira Weiny <[e-mail]>
Cc: Jason Gunthorpe <[e-mail]>
Cc: Jens Axboe <[e-mail]>
Cc: Jilin Yuan <[e-mail]>
Cc: Jiri Slaby <[e-mail]>
Cc: Len Brown <[e-mail]>
Cc: Mark Gross <[e-mail]>
Cc: "Martin K. Petersen" <[e-mail]>
Cc: "Matthew Wilcox (Oracle)" <[e-mail]>
Cc: Maximilian Luz <[e-mail]>
Cc: Michael Jamet <[e-mail]>
Cc: Ming Lei <[e-mail]>
Cc: Pierre-Louis Bossart <[e-mail]>
Cc: Rob Herring <[e-mail]>
Cc: Sakari Ailus <[e-mail]>
Cc: Sanyog Kale <[e-mail]>
Cc: Sean Young <[e-mail]>
Cc: Stefan Richter <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: Won Chung <[e-mail]>
Cc: Yehezkel Bernat <[e-mail]>
Acked-by: Rafael J. Wysocki <[e-mail]>
Acked-by: Mika Westerberg <[e-mail]> # for Thunderbolt
Acked-by: Mauro Carvalho Chehab <[e-mail]>
Acked-by: Alexandre Belloni <[e-mail]>
Acked-by: Heikki Krogerus <[e-mail]>
Acked-by: Wolfram Sang <[e-mail]>
Acked-by: Vinod Koul <[e-mail]>
Acked-by: Hans de Goede <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

block/partitions/core.c

···
 	iput(dev_to_bdev(dev)->bd_inode);
 }
 
-static int part_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int part_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct block_device *part = dev_to_bdev(dev);
+	const struct block_device *part = dev_to_bdev(dev);
 
 	add_uevent_var(env, "PARTN=%u", part->bd_partno);
 	if (part->bd_meta_info && part->bd_meta_info->volname[0])

drivers/acpi/device_sysfs.c

···
  *         -EINVAL: output error
  *         -ENOMEM: output is truncated
  */
-static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
+static int create_pnp_modalias(const struct acpi_device *acpi_dev, char *modalias,
 			       int size)
 {
 	int len;
···
  * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
  * ACPI/PNP IDs.
  */
-static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
+static int create_of_modalias(const struct acpi_device *acpi_dev, char *modalias,
 			      int size)
 {
 	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
···
 	return len;
 }
 
-int __acpi_device_uevent_modalias(struct acpi_device *adev,
+int __acpi_device_uevent_modalias(const struct acpi_device *adev,
 				  struct kobj_uevent_env *env)
 {
 	int len;
···
  * Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
  * hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
  */
-int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
+int acpi_device_uevent_modalias(const struct device *dev, struct kobj_uevent_env *env)
 {
 	return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
 }

drivers/acpi/internal.h

···
                      Device Matching and Notification
    -------------------------------------------------------------------------- */
 struct acpi_device *acpi_companion_match(const struct device *dev);
-int __acpi_device_uevent_modalias(struct acpi_device *adev,
+int __acpi_device_uevent_modalias(const struct acpi_device *adev,
 				  struct kobj_uevent_env *env);
 
 /* --------------------------------------------------------------------------

drivers/firewire/core-device.c

···
 	}
 }
 
-static void get_modalias_ids(struct fw_unit *unit, int *id)
+static void get_modalias_ids(const struct fw_unit *unit, int *id)
 {
 	get_ids(&fw_parent_device(unit)->config_rom[5], id);
 	get_ids(unit->directory, id);
···
 	driver->remove(fw_unit(dev));
 }
 
-static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size)
+static int get_modalias(const struct fw_unit *unit, char *buffer, size_t buffer_size)
 {
 	int id[] = {0, 0, 0, 0};
 
···
 			id[0], id[1], id[2], id[3]);
 }
 
-static int fw_unit_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int fw_unit_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct fw_unit *unit = fw_unit(dev);
+	const struct fw_unit *unit = fw_unit(dev);
 	char modalias[64];
 
 	get_modalias(unit, modalias, sizeof(modalias));

drivers/gpu/drm/display/drm_dp_aux_bus.c

···
 	kfree(aux_ep_with_data);
 }
 
-static int dp_aux_ep_dev_modalias(struct device *dev, struct kobj_uevent_env *env)
+static int dp_aux_ep_dev_modalias(const struct device *dev, struct kobj_uevent_env *env)
 {
 	return of_device_uevent_modalias(dev, env);
 }

drivers/i2c/i2c-core-base.c

···
 	return 0;
 }
 
-static int i2c_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int i2c_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct i2c_client *client = to_i2c_client(dev);
+	const struct i2c_client *client = to_i2c_client(dev);
 	int rc;
 
 	rc = of_device_uevent_modalias(dev, env);

drivers/i3c/device.c

···
  *
  * Retrieve I3C dev info.
  */
-void i3c_device_get_info(struct i3c_device *dev,
+void i3c_device_get_info(const struct i3c_device *dev,
 			 struct i3c_device_info *info)
 {
 	if (!info)

drivers/i3c/master.c

···
 };
 ATTRIBUTE_GROUPS(i3c_device);
 
-static int i3c_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int i3c_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct i3c_device *i3cdev = dev_to_i3cdev(dev);
+	const struct i3c_device *i3cdev = dev_to_i3cdev(dev);
 	struct i3c_device_info devinfo;
 	u16 manuf, part, ext;
 

drivers/input/input.c

···
 INPUT_DEV_STRING_ATTR_SHOW(uniq);
 
 static int input_print_modalias_bits(char *buf, int size,
-				     char name, unsigned long *bm,
+				     char name, const unsigned long *bm,
 				     unsigned int min_bit, unsigned int max_bit)
 {
 	int len = 0, i;
···
 	return len;
 }
 
-static int input_print_modalias(char *buf, int size, struct input_dev *id,
+static int input_print_modalias(char *buf, int size, const struct input_dev *id,
 				int add_cr)
 {
 	int len;
···
 }
 static DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
 
-static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
+static int input_print_bitmap(char *buf, int buf_size, const unsigned long *bitmap,
 			      int max, int add_cr);
 
 static ssize_t input_dev_show_properties(struct device *dev,
···
 	.attrs	= input_dev_id_attrs,
 };
 
-static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
+static int input_print_bitmap(char *buf, int buf_size, const unsigned long *bitmap,
 			      int max, int add_cr)
 {
 	int i;
···
  * device bitfields.
  */
 static int input_add_uevent_bm_var(struct kobj_uevent_env *env,
-				   const char *name, unsigned long *bitmap, int max)
+				   const char *name, const unsigned long *bitmap, int max)
 {
 	int len;
 
···
 }
 
 static int input_add_uevent_modalias_var(struct kobj_uevent_env *env,
-					 struct input_dev *dev)
+					 const struct input_dev *dev)
 {
 	int len;
 
···
 			return err;					\
 	} while (0)
 
-static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env)
+static int input_dev_uevent(const struct device *device, struct kobj_uevent_env *env)
 {
-	struct input_dev *dev = to_input_dev(device);
+	const struct input_dev *dev = to_input_dev(device);
 
 	INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x",
 				dev->id.bustype, dev->id.vendor,

drivers/media/rc/rc-main.c

···
 	kfree(dev);
 }
 
-static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env)
+static int rc_dev_uevent(const struct device *device, struct kobj_uevent_env *env)
 {
 	struct rc_dev *dev = to_rc_dev(device);
 	int ret = 0;

drivers/platform/surface/aggregator/bus.c

···
 };
 ATTRIBUTE_GROUPS(ssam_device);
 
-static int ssam_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int ssam_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct ssam_device *sdev = to_ssam_device(dev);
+	const struct ssam_device *sdev = to_ssam_device(dev);
 
 	return add_uevent_var(env, "MODALIAS=ssam:d%02Xc%02Xt%02Xi%02Xf%02X",
 			      sdev->uid.domain, sdev->uid.category,

drivers/soundwire/bus_type.c

···
 			slave->id.sdw_version, slave->id.class_id);
 }
 
-int sdw_slave_uevent(struct device *dev, struct kobj_uevent_env *env)
+int sdw_slave_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct sdw_slave *slave = dev_to_sdw_dev(dev);
+	const struct sdw_slave *slave = dev_to_sdw_dev(dev);
 	char modalias[32];
 
 	sdw_slave_modalias(slave, modalias, sizeof(modalias));

drivers/thunderbolt/switch.c

···
 	kfree(sw);
 }
 
-static int tb_switch_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int tb_switch_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct tb_switch *sw = tb_to_switch(dev);
+	const struct tb_switch *sw = tb_to_switch(dev);
 	const char *type;
 
 	if (sw->config.thunderbolt_version == USB4_VERSION_1_0) {

drivers/thunderbolt/tb.h

···
 	return dev->type == &tb_switch_type;
 }
 
-static inline struct tb_switch *tb_to_switch(struct device *dev)
+static inline struct tb_switch *tb_to_switch(const struct device *dev)
 {
 	if (tb_is_switch(dev))
 		return container_of(dev, struct tb_switch, dev);

drivers/thunderbolt/xdomain.c

···
 }
 static DEVICE_ATTR_RO(key);
 
-static int get_modalias(struct tb_service *svc, char *buf, size_t size)
+static int get_modalias(const struct tb_service *svc, char *buf, size_t size)
 {
 	return snprintf(buf, size, "tbsvc:k%sp%08Xv%08Xr%08X", svc->key,
 			svc->prtcid, svc->prtcvers, svc->prtcrevs);
···
 	NULL,
 };
 
-static int tb_service_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int tb_service_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct tb_service *svc = container_of(dev, struct tb_service, dev);
+	const struct tb_service *svc = container_of_const(dev, struct tb_service, dev);
 	char modalias[64];
 
 	get_modalias(svc, modalias, sizeof(modalias));

drivers/tty/serdev/core.c

···
 };
 ATTRIBUTE_GROUPS(serdev_device);
 
-static int serdev_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int serdev_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	int rc;
 

drivers/usb/core/message.c

···
 	}
 }
 
-static int usb_if_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int usb_if_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct usb_device *usb_dev;
-	struct usb_interface *intf;
-	struct usb_host_interface *alt;
+	const struct usb_device *usb_dev;
+	const struct usb_interface *intf;
+	const struct usb_host_interface *alt;
 
 	intf = to_usb_interface(dev);
 	usb_dev = interface_to_usbdev(intf);

drivers/usb/core/usb.c

···
 	kfree(udev);
 }
 
-static int usb_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int usb_dev_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct usb_device *usb_dev;
+	const struct usb_device *usb_dev;
 
 	usb_dev = to_usb_device(dev);
 

drivers/usb/phy/phy.c

···
 	return ERR_PTR(-EPROBE_DEFER);
 }
 
-static struct usb_phy *__device_to_usb_phy(struct device *dev)
+static struct usb_phy *__device_to_usb_phy(const struct device *dev)
 {
 	struct usb_phy *usb_phy;
 
···
 	kobject_uevent(&usb_phy->dev->kobj, KOBJ_CHANGE);
 }
 
-static int usb_phy_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int usb_phy_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct usb_phy *usb_phy;
+	const struct usb_phy *usb_phy;
 	char uchger_state[50] = { 0 };
 	char uchger_type[50] = { 0 };
 	unsigned long flags;

drivers/usb/roles/class.c

···
 	NULL,
 };
 
-static int
-usb_role_switch_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int usb_role_switch_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	int ret;
 

drivers/usb/typec/class.c

···
 	NULL
 };
 
-static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int typec_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	int ret;
 

include/linux/acpi.h

···
 const void *acpi_device_get_match_data(const struct device *dev);
 extern bool acpi_driver_match_device(struct device *dev,
 				     const struct device_driver *drv);
-int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
+int acpi_device_uevent_modalias(const struct device *, struct kobj_uevent_env *);
 int acpi_device_modalias(struct device *, char *, int);
 
 struct platform_device *acpi_create_platform_device(struct acpi_device *,
···
 	return NULL;
 }
 
-static inline int acpi_device_uevent_modalias(struct device *dev,
+static inline int acpi_device_uevent_modalias(const struct device *dev,
 				struct kobj_uevent_env *env)
 {
 	return -ENODEV;

include/linux/device.h

···
 struct device_type {
 	const char *name;
 	const struct attribute_group **groups;
-	int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
+	int (*uevent)(const struct device *dev, struct kobj_uevent_env *env);
 	char *(*devnode)(struct device *dev, umode_t *mode,
 			 kuid_t *uid, kgid_t *gid);
 	void (*release)(struct device *dev);

include/linux/i3c/device.h

···
 
 int i3c_device_do_setdasa(struct i3c_device *dev);
 
-void i3c_device_get_info(struct i3c_device *dev, struct i3c_device_info *info);
+void i3c_device_get_info(const struct i3c_device *dev, struct i3c_device_info *info);
 
 struct i3c_ibi_payload {
 	unsigned int len;

include/linux/soundwire/sdw_type.h

···
 int __sdw_register_driver(struct sdw_driver *drv, struct module *owner);
 void sdw_unregister_driver(struct sdw_driver *drv);
 
-int sdw_slave_uevent(struct device *dev, struct kobj_uevent_env *env);
+int sdw_slave_uevent(const struct device *dev, struct kobj_uevent_env *env);
 
 /**
  * module_sdw_driver() - Helper macro for registering a Soundwire driver