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scsi: Introduce scsi_start_queue() 

This patch does not change any functionality.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Israel Rukshin <israelr@mellanox.com>
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2017-06-02 14:21:56 -07:00 committed by Martin K. Petersen
parent 0db6ca8a5e
commit 66483a4a9f
2 changed files with 16 additions and 10 deletions
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25
drivers/scsi/scsi_lib.c
View File

@ -3031,6 +3031,20 @@ static int scsi_internal_device_block(struct scsi_device *sdev)
return err;
}
void scsi_start_queue(struct scsi_device *sdev)
{
struct request_queue *q = sdev->request_queue;
unsigned long flags;
if (q->mq_ops) {
blk_mq_start_stopped_hw_queues(q, false);
} else {
spin_lock_irqsave(q->queue_lock, flags);
blk_start_queue(q);
spin_unlock_irqrestore(q->queue_lock, flags);
}
}
/**
* scsi_internal_device_unblock_nowait - resume a device after a block request
* @sdev: device to resume
@ -3049,9 +3063,6 @@ static int scsi_internal_device_block(struct scsi_device *sdev)
int scsi_internal_device_unblock_nowait(struct scsi_device *sdev,
enum scsi_device_state new_state)
{
struct request_queue *q = sdev->request_queue;
unsigned long flags;
/*
* Try to transition the scsi device to SDEV_RUNNING or one of the
* offlined states and goose the device queue if successful.
@ -3069,13 +3080,7 @@ int scsi_internal_device_unblock_nowait(struct scsi_device *sdev,
sdev->sdev_state != SDEV_OFFLINE)
return -EINVAL;
if (q->mq_ops) {
blk_mq_start_stopped_hw_queues(q, false);
} else {
spin_lock_irqsave(q->queue_lock, flags);
blk_start_queue(q);
spin_unlock_irqrestore(q->queue_lock, flags);
}
scsi_start_queue(sdev);
return 0;
}

1
drivers/scsi/scsi_priv.h
View File

@ -88,6 +88,7 @@ extern void scsi_run_host_queues(struct Scsi_Host *shost);
extern void scsi_requeue_run_queue(struct work_struct *work);
extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
extern struct request_queue *scsi_mq_alloc_queue(struct scsi_device *sdev);
extern void scsi_start_queue(struct scsi_device *sdev);
extern int scsi_mq_setup_tags(struct Scsi_Host *shost);
extern void scsi_mq_destroy_tags(struct Scsi_Host *shost);
extern int scsi_init_queue(void);