From 7456fea589c6ad3422b0c188871ae80e1d307737 Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Thu, 28 Jan 2021 10:10:47 +0100 Subject: i3c: Handle drivers without probe or remove callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A registered driver without a probe callback doesn't make sense, so refuse to register such a driver. (Otherwise i3c_device_probe() yields a NULL pointer exception.) A driver without remove is possible, e.g. when all resources are freed using devm callbacks. So guard the call to driver->remove by a check for being non-NULL. Note that the only in-tree i3c driver (drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c) doesn't have a remove callback. Signed-off-by: Uwe Kleine-König Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20210128091048.17006-1-u.kleine-koenig@pengutronix.de --- drivers/i3c/device.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/i3c/device.c') diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c index bb8e60dff988..e92d3e9a52bd 100644 --- a/drivers/i3c/device.c +++ b/drivers/i3c/device.c @@ -262,6 +262,11 @@ int i3c_driver_register_with_owner(struct i3c_driver *drv, struct module *owner) drv->driver.owner = owner; drv->driver.bus = &i3c_bus_type; + if (!drv->probe) { + pr_err("Trying to register an i3c driver without probe callback\n"); + return -EINVAL; + } + return driver_register(&drv->driver); } EXPORT_SYMBOL_GPL(i3c_driver_register_with_owner); -- cgit v1.2.3