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serdev: only match serdev devices 

Only serdev devices (a.k.a. clients or slaves) are bound to drivers so
bail out early from match() in case the device is not a serdev device
(i.e. if it's a serdev controller).

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2018-01-09 17:09:17 +01:00 committed by Greg Kroah-Hartman
parent 2460942f51
commit 7ee69102db
1 changed files with 8 additions and 0 deletions
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8
drivers/tty/serdev/core.c
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@ -63,6 +63,11 @@ static const struct device_type serdev_device_type = {
.release = serdev_device_release, .release = serdev_device_release,
}; };
static bool is_serdev_device(const struct device *dev)
{
return dev->type == &serdev_device_type;
}
static void serdev_ctrl_release(struct device *dev) static void serdev_ctrl_release(struct device *dev)
{ {
struct serdev_controller *ctrl = to_serdev_controller(dev); struct serdev_controller *ctrl = to_serdev_controller(dev);
@ -76,6 +81,9 @@ static const struct device_type serdev_ctrl_type = {
static int serdev_device_match(struct device *dev, struct device_driver *drv) static int serdev_device_match(struct device *dev, struct device_driver *drv)
{ {
if (!is_serdev_device(dev))
return 0;
/* TODO: platform matching */ /* TODO: platform matching */
if (acpi_driver_match_device(dev, drv)) if (acpi_driver_match_device(dev, drv))
return 1; return 1;