scsi: Split scsi_internal_device_block()
Instead of passing a "wait" argument to scsi_internal_device_block(), split this function into a function that waits and a function that doesn't wait. This will make it easier to serialize SCSI device state changes through a mutex. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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