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scsi: core: add scsi_host_(block,unblock) helper function
Add helper functions to call scsi_internal_device_block()/ scsi_internal_device_unblock() for all attached devices on a SCSI host. Link: https://lore.kernel.org/r/20200228075318.91255-9-hare@suse.de Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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2 changed files with 32 additions and 0 deletions
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@ -2845,6 +2845,36 @@ scsi_target_unblock(struct device *dev, enum scsi_device_state new_state)
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}
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EXPORT_SYMBOL_GPL(scsi_target_unblock);
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int
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scsi_host_block(struct Scsi_Host *shost)
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{
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struct scsi_device *sdev;
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int ret = 0;
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shost_for_each_device(sdev, shost) {
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ret = scsi_internal_device_block(sdev);
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if (ret)
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(scsi_host_block);
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int
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scsi_host_unblock(struct Scsi_Host *shost, int new_state)
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{
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struct scsi_device *sdev;
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int ret = 0;
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shost_for_each_device(sdev, shost) {
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ret = scsi_internal_device_unblock(sdev, new_state);
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if (ret)
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(scsi_host_unblock);
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/**
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* scsi_kmap_atomic_sg - find and atomically map an sg-elemnt
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* @sgl: scatter-gather list
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@ -758,6 +758,8 @@ static inline int scsi_host_scan_allowed(struct Scsi_Host *shost)
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extern void scsi_unblock_requests(struct Scsi_Host *);
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extern void scsi_block_requests(struct Scsi_Host *);
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extern int scsi_host_block(struct Scsi_Host *shost);
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extern int scsi_host_unblock(struct Scsi_Host *shost, int new_state);
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struct class_container;
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