[PATCH v2 20/24] serdev: Make match_id accessible by drivers

[Ricardo Ribalda Delgado]

Drivers that make use of the driver_data field require to transverse the
id_table. There is no reason to have one implementation per driver.

Cc: Rob Herring <r...@kernel.org>
Cc: Johan Hovold <jo...@kernel.org>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Jiri Slaby <jsl...@suse.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.riba...@gmail.com>
---
 drivers/tty/serdev/core.c | 12 +++++++-----
 include/linux/serdev.h    |  3 +++
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index 587d2796b3d5..3084b6d10179 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -158,17 +158,19 @@ static const struct device_type serdev_ctrl_type = {
        .release        = serdev_ctrl_release,
 };
 
-static int serdev_match_id(const struct serdev_device_id *id,
-                          const struct serdev_device *sdev)
+const struct serdev_device_id *serdev_match_id(
+                       const struct serdev_device_id *id,
+                       const struct serdev_device *sdev)
 {
        while (id->name[0]) {
                if (!strcmp(sdev->modalias, id->name))
-                       return 1;
+                       return id;
                id++;
        }
 
-       return 0;
+       return NULL;
 }
+EXPORT_SYMBOL_GPL(serdev_match_id);
 
 static int serdev_device_match(struct device *dev, struct device_driver *drv)
 {
@@ -186,7 +188,7 @@ static int serdev_device_match(struct device *dev, struct 
device_driver *drv)
                return 1;
 
        if (sdrv->id_table)
-               return serdev_match_id(sdrv->id_table, sdev);
+               return serdev_match_id(sdrv->id_table, sdev) != NULL;
 
        return strcmp(sdev->modalias, drv->name) == 0;
 }
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index 07d63933bdb9..bf282b3781b9 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -172,6 +172,9 @@ static inline void serdev_controller_put(struct 
serdev_controller *ctrl)
                put_device(&ctrl->dev);
 }
 
+const struct serdev_device_id *serdev_match_id(
+               const struct serdev_device_id *id,
+               const struct serdev_device *sdev);
 struct serdev_device *serdev_device_alloc(struct serdev_controller *);
 int serdev_device_add(struct serdev_device *);
 void serdev_device_remove(struct serdev_device *);
-- 
2.17.1