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pktcdvd: Check queue type before attaching to a queue 

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 82ed4db499 ("block: split scsi_request out of struct request")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Bart Van Assche 2017-05-31 14:43:48 -07:00 committed by Jens Axboe
parent d9f9726446
commit ec2be6a98e
1 changed files with 5 additions and 0 deletions
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5
drivers/block/pktcdvd.c
View File

@ -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_passthrough(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;