On 8/9/18 8:53 AM, Bart Van Assche wrote:

Hello Jens,

Several block drivers call alloc_disk() followed by put_disk() if something
fails before device_add_disk() is called without calling blk_cleanup_queue().
Make sure that also for this scenario a request queue is dissociated from the
cgroup controller. This patch avoids that loading the parport_pc, paride and
pf drivers trigger a kernel crash. Since this patch series fixes a regression,
please consider these patches for kernel v4.19.

Thanks, applied for 4.19.

-- 
Jens Axboe