diff options
| author |   Even Xu <even.xu@intel.com> | 2018-09-11 16:44:17 -0700 |
|---|---|---|
| committer |   Jiri Kosina <jkosina@suse.cz> | 2018-09-24 11:20:06 +0200 |
| commit | e625020b2c1e51a216094d60a6a72596926dd77d (patch) | |
| tree | 80056cb89c9c1a06263d5adff2bd9a497321a0cb /drivers/hid | |
| parent | HID: intel-ish-hid: use helper function to access client buffer (diff) | |
| download | linux-dev-e625020b2c1e51a216094d60a6a72596926dd77d.tar.xz linux-dev-e625020b2c1e51a216094d60a6a72596926dd77d.zip | |
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: Even Xu <even.xu@intel.com>
Reviewed-by: Andriy Shevchenko <andriy.shevchenko@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/intel-ish-hid/ishtp/bus.c | 25 | ||||
| -rw-r--r-- | drivers/hid/intel-ish-hid/ishtp/bus.h | 2 |
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/hid/intel-ish-hid/ishtp/bus.c b/drivers/hid/intel-ish-hid/ishtp/bus.c index d5db5e96e4a1..728dc6d4561a 100644 --- a/drivers/hid/intel-ish-hid/ishtp/bus.c +++ b/drivers/hid/intel-ish-hid/ishtp/bus.c @@ -149,6 +149,31 @@ 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 * @client_id: fw client id to search diff --git a/drivers/hid/intel-ish-hid/ishtp/bus.h b/drivers/hid/intel-ish-hid/ishtp/bus.h index 88883311667e..b8a5bcc82536 100644 --- a/drivers/hid/intel-ish-hid/ishtp/bus.h +++ b/drivers/hid/intel-ish-hid/ishtp/bus.h @@ -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 */ |