dmaengine: protect 'id' from concurrent registrations
There is a possibility to have two devices registered with the same id. Cc: <stable@kernel.org> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
parent
532d3b1f86
commit
b0b42b16ff
|
@ -388,7 +388,10 @@ int dma_async_device_register(struct dma_device *device)
|
|||
|
||||
init_completion(&device->done);
|
||||
kref_init(&device->refcount);
|
||||
|
||||
mutex_lock(&dma_list_mutex);
|
||||
device->dev_id = id++;
|
||||
mutex_unlock(&dma_list_mutex);
|
||||
|
||||
/* represent channels in sysfs. Probably want devs too */
|
||||
list_for_each_entry(chan, &device->channels, device_node) {
|
||||
|
|
Loading…
Reference in a new issue