Here is a sample of the kernel lockdep warning I got after turingon dynamic debugging: https://bugzilla.kernel.org/show_bug.cgi?id=73321#c3 On Tue, May 13, 2014 at 8:03 PM, Reyad Attiyat <reyad.attiyat@xxxxxxxxx> wrote: > Changes all dyn_callback_lock spinlocks to spinlocks that disable > interrupts. The dynamic callback lock (dyn_callback_lock) must not be > interrupted when locked as it is used in an interrupt handler > function, sensor_hub_raw_event. > --- > drivers/hid/hid-sensor-hub.c | 31 ++++++++++++++++++------------- > 1 file changed, 18 insertions(+), 13 deletions(-) > > diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c > index af8244b..1e1644c 100644 > --- a/drivers/hid/hid-sensor-hub.c > +++ b/drivers/hid/hid-sensor-hub.c > @@ -133,10 +133,11 @@ static struct hid_sensor_hub_callbacks > *sensor_hub_get_callback( > struct hid_sensor_hub_device **hsdev, > void **priv) > { > + unsigned long flags; > struct hid_sensor_hub_callbacks_list *callback; > struct sensor_hub_data *pdata = hid_get_drvdata(hdev); > > - spin_lock(&pdata->dyn_callback_lock); > + spin_lock_irqsave(&pdata->dyn_callback_lock, flags); > list_for_each_entry(callback, &pdata->dyn_callback_list, list) > if (callback->usage_id == usage_id && > (collection_index >= > @@ -145,10 +146,10 @@ static struct hid_sensor_hub_callbacks > *sensor_hub_get_callback( > callback->hsdev->end_collection_index)) { > *priv = callback->priv; > *hsdev = callback->hsdev; > - spin_unlock(&pdata->dyn_callback_lock); > + spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); > return callback->usage_callback; > } > - spin_unlock(&pdata->dyn_callback_lock); > + spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); > > return NULL; > } > @@ -157,19 +158,20 @@ int sensor_hub_register_callback(struct > hid_sensor_hub_device *hsdev, > u32 usage_id, > struct hid_sensor_hub_callbacks *usage_callback) > { > + unsigned long flags; > struct hid_sensor_hub_callbacks_list *callback; > struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); > > - spin_lock(&pdata->dyn_callback_lock); > + spin_lock_irqsave(&pdata->dyn_callback_lock, flags); > list_for_each_entry(callback, &pdata->dyn_callback_list, list) > if (callback->usage_id == usage_id && > callback->hsdev == hsdev) { > - spin_unlock(&pdata->dyn_callback_lock); > + spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); > return -EINVAL; > } > callback = kzalloc(sizeof(*callback), GFP_ATOMIC); > if (!callback) { > - spin_unlock(&pdata->dyn_callback_lock); > + spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); > return -ENOMEM; > } > callback->hsdev = hsdev; > @@ -177,7 +179,7 @@ int sensor_hub_register_callback(struct > hid_sensor_hub_device *hsdev, > callback->usage_id = usage_id; > callback->priv = NULL; > list_add_tail(&callback->list, &pdata->dyn_callback_list); > - spin_unlock(&pdata->dyn_callback_lock); > + spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); > > return 0; > } > @@ -186,10 +188,11 @@ EXPORT_SYMBOL_GPL(sensor_hub_register_callback); > int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, > u32 usage_id) > { > + unsigned long flags; > struct hid_sensor_hub_callbacks_list *callback; > struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); > > - spin_lock(&pdata->dyn_callback_lock); > + spin_lock_irqsave(&pdata->dyn_callback_lock, flags); > list_for_each_entry(callback, &pdata->dyn_callback_list, list) > if (callback->usage_id == usage_id && > callback->hsdev == hsdev) { > @@ -197,7 +200,7 @@ int sensor_hub_remove_callback(struct > hid_sensor_hub_device *hsdev, > kfree(callback); > break; > } > - spin_unlock(&pdata->dyn_callback_lock); > + spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); > > return 0; > } > @@ -376,34 +379,36 @@ EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); > #ifdef CONFIG_PM > static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) > { > + unsigned long flags; > struct sensor_hub_data *pdata = hid_get_drvdata(hdev); > struct hid_sensor_hub_callbacks_list *callback; > > hid_dbg(hdev, " sensor_hub_suspend\n"); > - spin_lock(&pdata->dyn_callback_lock); > + spin_lock_irqsave(&pdata->dyn_callback_lock, flags); > list_for_each_entry(callback, &pdata->dyn_callback_list, list) { > if (callback->usage_callback->suspend) > callback->usage_callback->suspend( > callback->hsdev, callback->priv); > } > - spin_unlock(&pdata->dyn_callback_lock); > + spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); > > return 0; > } > > static int sensor_hub_resume(struct hid_device *hdev) > { > + unsigned long flags; > struct sensor_hub_data *pdata = hid_get_drvdata(hdev); > struct hid_sensor_hub_callbacks_list *callback; > > hid_dbg(hdev, " sensor_hub_resume\n"); > - spin_lock(&pdata->dyn_callback_lock); > + spin_lock_irqsave(&pdata->dyn_callback_lock, flags); > list_for_each_entry(callback, &pdata->dyn_callback_list, list) { > if (callback->usage_callback->resume) > callback->usage_callback->resume( > callback->hsdev, callback->priv); > } > - spin_unlock(&pdata->dyn_callback_lock); > + spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); > > return 0; > } > -- > 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
