diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-07-29 09:23:20 +0400 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-07-31 07:50:56 +0400 |
commit | b05681b91709a19b40a452f566cc852619b30082 (patch) | |
tree | 7802a9adcf6cb73b534e7f9b197ce7f8c4fcd602 /drivers/media/rc/rc-main.c | |
parent | eaceba650dea4af61f6f3a4919caa096bb4c2929 (diff) | |
download | linux-b05681b91709a19b40a452f566cc852619b30082.tar.xz |
[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 <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/rc/rc-main.c')
-rw-r--r-- | drivers/media/rc/rc-main.c | 29 |
1 files changed, 19 insertions, 10 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); + /* Freeing the table should also call the stop callback */ + ir_free_table(&dev->rc_map); + IR_dprintk(1, "Freed keycode table\n"); + input_unregister_device(dev->input_dev); dev->input_dev = NULL; - ir_free_table(&dev->rc_map); - IR_dprintk(1, "Freed keycode table\n"); + device_del(&dev->dev); - device_unregister(&dev->dev); + rc_free_device(dev); } + EXPORT_SYMBOL_GPL(rc_unregister_device); /* |