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

Message ID 20170524003420.5381-14-bart.vanassche@sandisk.com (mailing list archive)
State Changes Requested, archived
Headers show

Commit Message

Bart Van Assche May 24, 2017, 12:34 a.m. UTC 
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(+)

Comments

Hannes Reinecke May 24, 2017, 6:02 a.m. UTC | #1 
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
diff mbox

Patch

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;