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Date: Thu, 26 May 2016 08:53:00 -0600 From: Jens Axboe <axboe@...nel.dk> To: Ming Lin <mlin@...nel.org>, linux-kernel@...r.kernel.org, linux-block@...r.kernel.org Cc: Jens Axboe <axboe@...com>, Christoph Hellwig <hch@....de> Subject: Re: [PATCH] blk-mq: clear q->mq_ops if init fail On 05/26/2016 12:23 AM, Ming Lin wrote: > From: Ming Lin <ming.l@...sung.com> > > blk_mq_init_queue() calls blk_mq_init_allocated_queue(), but q->mq_ops > was not cleared when blk_mq_init_allocated_queue() fails. > Then blk_cleanup_queue() calls blk_mq_free_queue() which will crash because: > - q->all_q_node is not added to all_q_list yet > - q->tag_set is NULL > - hctx was not setup yet or already freed > > Fixed it by clearing q->mq_ops on error path. Thanks Ming, applied for this series. -- Jens Axboe
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