blk-mq: check q->poll_stat in queue_poll_stat_show
Without checking q->poll_stat in queue_poll_stat_show(), kernel panic may be caused if q->poll_stat isn't allocated. Fixes: 48b5c1fb ("block: only allocate poll_stats if there's a user of them") Signed-off-by:Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20211202090716.3292244-1-ming.lei@redhat.com Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
8a751893
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