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HID: intel-ish-hid: ishtp: add helper function for client search

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

Signed-off-by: Even Xu <[email protected]>
Reviewed-by: Andriy Shevchenko <[email protected]>
Acked-by: Srinivas Pandruvada <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>
This commit is contained in:
Even Xu 2018-09-11 16:44:17 -07:00 • committed by Jiri Kosina
commit e625020b2c
2 changed files with 27 additions and 0 deletions
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25
drivers/hid/intel-ish-hid/ishtp/bus.c
View file

@ -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

2
drivers/hid/intel-ish-hid/ishtp/bus.h
View file

@ -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 */