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Commit e625020b authored by Even Xu's avatar Even Xu Committed by Jiri Kosina
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HID: intel-ish-hid: ishtp: add helper function for client search 



Add helper function ishtp_fw_cl_get_client() for client driver searching
client information to hide internal details from callers.

Signed-off-by: default avatarEven Xu <even.xu@intel.com>
Reviewed-by: default avatarAndriy Shevchenko <andriy.shevchenko@intel.com>
Acked-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 816e7ed1

drivers/hid/intel-ish-hid/ishtp/bus.c

+25 −0
Original line number Diff line number Diff line
@@ -148,6 +148,31 @@ int ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const uuid_le *uuid) 
}

EXPORT_SYMBOL(ishtp_fw_cl_by_uuid);



/**

 * ishtp_fw_cl_get_client() - return client information to client

 * @dev: the ishtp device structure

 * @uuid: uuid of the client to search

 *

 * Search firmware client using UUID and reture related client information.

 *

 * Return: pointer of client information on success, NULL on failure.

 */

struct ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev,

						const uuid_le *uuid)

{

	int i;

	unsigned long flags;



	spin_lock_irqsave(&dev->fw_clients_lock, flags);

	i = ishtp_fw_cl_by_uuid(dev, uuid);

	spin_unlock_irqrestore(&dev->fw_clients_lock, flags);

	if (i < 0 || dev->fw_clients[i].props.fixed_address)

		return NULL;



	return &dev->fw_clients[i];

}

EXPORT_SYMBOL(ishtp_fw_cl_get_client);



/**

 * ishtp_fw_cl_by_id() - return index to fw_clients for client_id

 * @dev: the ishtp device structure

drivers/hid/intel-ish-hid/ishtp/bus.h

+2 −0
Original line number Diff line number Diff line
@@ -113,5 +113,7 @@ void ishtp_cl_driver_unregister(struct ishtp_cl_driver *driver); 
int	ishtp_register_event_cb(struct ishtp_cl_device *device,

				void (*read_cb)(struct ishtp_cl_device *));

int	ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const uuid_le *cuuid);

struct	ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev,

						const uuid_le *uuid);



#endif /* _LINUX_ISHTP_CL_BUS_H */