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block: Introduce queue flag QUEUE_FLAG_SCSI_PASSTHROUGH

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From the context where a SCSI command is submitted it is not always
possible to figure out whether or not the queue the command is
submitted to has struct scsi_request as the first member of its
private data. Hence introduce the flag QUEUE_FLAG_SCSI_PASSTHROUGH.

Signed-off-by: Bart Van Assche <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Martin K. Petersen <[email protected]>
Cc: Omar Sandoval <[email protected]>
Cc: Don Brace <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Bart Van Assche 2017-05-31 14:43:46 -07:00 • committed by Jens Axboe
commit 9efc160f4b
6 changed files with 9 additions and 0 deletions
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block/bsg-lib.c
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@ -246,6 +246,7 @@ struct request_queue *bsg_setup_queue(struct device *dev, char *name,
q->bsg_job_size = dd_job_size;
q->bsg_job_fn = job_fn;
queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
blk_queue_softirq_done(q, bsg_softirq_done);
blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);