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[SCSI] host state model update: mediate host add/remove race

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Add support to not allow additions to a host when it is being removed.

Signed-off-by: Mike Anderson <andmike@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Mike Anderson
2005-06-16 11:14:33 -07:00
committed by James Bottomley
parent d2c9d9eafa
commit 82f29467a0
3 changed files with 25 additions and 7 deletions
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9
include/scsi/scsi_host.h
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@ -650,6 +650,15 @@ static inline struct device *scsi_get_device(struct Scsi_Host *shost)
return shost->shost_gendev.parent;
}
/**
* scsi_host_scan_allowed - Is scanning of this host allowed
* @shost: Pointer to Scsi_Host.
**/
static inline int scsi_host_scan_allowed(struct Scsi_Host *shost)
{
return shost->shost_state == SHOST_RUNNING;
}
extern void scsi_unblock_requests(struct Scsi_Host *);
extern void scsi_block_requests(struct Scsi_Host *);