From b05681b91709a19b40a452f566cc852619b30082 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Fri, 29 Jul 2011 02:23:20 -0300 Subject: [PATCH] [media] rc-main: Fix device de-registration logic rc unregister logic were deadly broken, preventing some drivers to be removed. Among the broken things, rc_dev_uevent() is being called during device_del(), causing a data filling on an area that it is not ready anymore. Also, some drivers have a stop callback defined, that needs to be called before data removal, as it stops data polling. Acked-by: Jarod Wilson Signed-off-by: Mauro Carvalho Chehab --- drivers/media/rc/rc-main.c | 31 ++++++++++++++++++++----------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c index 51a23f48bc7d..666d4bb5b1fb 100644 --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -928,10 +928,6 @@ out: static void rc_dev_release(struct device *device) { - struct rc_dev *dev = to_rc_dev(device); - - kfree(dev); - module_put(THIS_MODULE); } #define ADD_HOTPLUG_VAR(fmt, val...) \ @@ -945,6 +941,9 @@ static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) { struct rc_dev *dev = to_rc_dev(device); + if (!dev || !dev->input_dev) + return -ENODEV; + if (dev->rc_map.name) ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name); if (dev->driver_name) @@ -1013,10 +1012,16 @@ EXPORT_SYMBOL_GPL(rc_allocate_device); void rc_free_device(struct rc_dev *dev) { - if (dev) { + if (!dev) + return; + + if (dev->input_dev) input_free_device(dev->input_dev); - put_device(&dev->dev); - } + + put_device(&dev->dev); + + kfree(dev); + module_put(THIS_MODULE); } EXPORT_SYMBOL_GPL(rc_free_device); @@ -1143,14 +1148,18 @@ void rc_unregister_device(struct rc_dev *dev) if (dev->driver_type == RC_DRIVER_IR_RAW) ir_raw_event_unregister(dev); - input_unregister_device(dev->input_dev); - dev->input_dev = NULL; - + /* Freeing the table should also call the stop callback */ ir_free_table(&dev->rc_map); IR_dprintk(1, "Freed keycode table\n"); - device_unregister(&dev->dev); + input_unregister_device(dev->input_dev); + dev->input_dev = NULL; + + device_del(&dev->dev); + + rc_free_device(dev); } + EXPORT_SYMBOL_GPL(rc_unregister_device); /*