On Fri, 2017-03-24 at 11:39 -0600, Jens Axboe wrote: > Currently we return true in blk_mq_dispatch_rq_list() if we queued IO > successfully, but we really want to return whether or not the we made > progress. Progress includes if we got an error return. If we don't, > this can lead to a hang in blk_mq_sched_dispatch_requests() when a > driver is draining IO by returning BLK_MQ_QUEUE_ERROR instead of > manually ending the IO in error and return BLK_MQ_QUEUE_OK. Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
