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authorEven Xu <even.xu@intel.com>2018-09-11 16:44:17 -0700
committerJiri Kosina <jkosina@suse.cz>2018-09-24 11:20:06 +0200
commite625020b2c1e51a216094d60a6a72596926dd77d (patch)
tree80056cb89c9c1a06263d5adff2bd9a497321a0cb /drivers/hid
parent816e7ed1c85dbb5e477139d6f28ffd175d0a609e (diff)
downloadlinux-e625020b2c1e51a216094d60a6a72596926dd77d.tar.bz2
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.c25
-rw-r--r--drivers/hid/intel-ish-hid/ishtp/bus.h2
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 */