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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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2
drivers/scsi/scsi_lib.c
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@ -2057,6 +2057,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
{
struct device *dev = shost->dma_dev;
queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
/*
* this limit is imposed by hardware restrictions
*/

1
drivers/scsi/scsi_transport_sas.c
View file

@ -264,6 +264,7 @@ static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
q->queuedata = shost;
queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
return 0;
out_cleanup_queue: