On Fri, Dec 16, 2022 at 11:06:36PM +0800, huteng19901016@xxxxxxxxx wrote: > From: "huteng.ht" <huteng.ht@xxxxxxxxxxxxx> > > Since poll method in blk_mq_ops may not be implemented by driver, > add a judgement to avoid NULL pointer access. Have you actually observed this NULL pointer access occur? Because the poll attempt should have been abandoned much earlier due to the queue not having QUEUE_FLAG_POLL set. If a driver has that flag set without actually implementing ->poll(), though, that'd be a different bug.
