Re: [PATCH 13/31] pktcdvd: Check queue type before attaching to a queue

Hannes Reinecke
2017-05-24T06:02:08Z

On 05/24/2017 02:34 AM, Bart Van Assche wrote:
> Since the pktcdvd driver only supports request queues for which
> struct scsi_request is the first member of their private request
> data, refuse to register block layer queues for which struct
> scsi_request is not the first member of the private data.
>
> References: commit 82ed4db499b8 ("block: split scsi_request out of struct request")
> Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
> Cc: Jens Axboe <axboe@fb.com>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: Omar Sandoval <osandov@fb.com>
> Cc: Hannes Reinecke <hare@suse.com>
> Cc: linux-block@vger.kernel.org
> ---
> drivers/block/pktcdvd.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
> index 205b865ebeb9..b8ce55d7911d 100644
> --- a/drivers/block/pktcdvd.c
> +++ b/drivers/block/pktcdvd.c
> @@ -2583,6 +2583,11 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
> bdev = bdget(dev);
> if (!bdev)
> return -ENOMEM;
> + if (!blk_queue_scsi_sup(bdev_get_queue(bdev))) {
> + WARN_ONCE(true, "Attempt to register a non-SCSI queue\n");
> + bdput(bdev);
> + return -EINVAL;
> + }
> ret = blkdev_get(bdev, FMODE_READ | FMODE_NDELAY, NULL);
> if (ret)
> return ret;
>
Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@suse.de +49 911 74053 688
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