admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

iio: core: add missing mutex_destroy in iio_dev_release()

Browse Source 
Add missing mutex_destroy() call in iio_dev_release() to properly
clean up the mutex initialized in iio_device_alloc(). Ensure proper
resource cleanup and follows kernel practices.

Found by code review.

While at it, create a lockdep key before mutex initialisation.
This will help with converting it to the better API in the future.

Fixes: 847ec80bba ("Staging: IIO: core support for device registration and management")
Fixes: ac917a8111 ("staging:iio:core set the iio_dev.info pointer to null on unregister under lock.")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Andy Shevchenko
2025-11-12 15:55:08 +01:00
committed by Jonathan Cameron
parent 0ecad19643
commit f5d203467a
1 changed files with 7 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/iio/industrialio-core.c
View File

@@ -1654,6 +1654,9 @@ static void iio_dev_release(struct device *device)
iio_device_detach_buffers(indio_dev);
mutex_destroy(&iio_dev_opaque->info_exist_lock);
mutex_destroy(&iio_dev_opaque->mlock);
lockdep_unregister_key(&iio_dev_opaque->mlock_key);
ida_free(&iio_ida, iio_dev_opaque->id);
@@ -1698,8 +1701,7 @@ struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
indio_dev->dev.type = &iio_device_type;
indio_dev->dev.bus = &iio_bus_type;
device_initialize(&indio_dev->dev);
mutex_init(&iio_dev_opaque->mlock);
mutex_init(&iio_dev_opaque->info_exist_lock);
INIT_LIST_HEAD(&iio_dev_opaque->channel_attr_list);
iio_dev_opaque->id = ida_alloc(&iio_ida, GFP_KERNEL);
@@ -1722,6 +1724,9 @@ struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
lockdep_register_key(&iio_dev_opaque->mlock_key);
lockdep_set_class(&iio_dev_opaque->mlock, &iio_dev_opaque->mlock_key);
mutex_init(&iio_dev_opaque->mlock);
mutex_init(&iio_dev_opaque->info_exist_lock);
return indio_dev;
}
EXPORT_SYMBOL(iio_device_alloc);