From 25d7c363f2663fe399e623c9bd819258c9760bdc Mon Sep 17 00:00:00 2001 From: Tony Battersby Date: Mon, 12 Nov 2007 10:00:44 -0500 Subject: [SCSI] move single_lun flag from scsi_device to scsi_target Some SCSI tape medium changers that need the BLIST_SINGLELUN flag have the medium changer at one LUN and the tape drive at a different LUN. The inquiry string of the tape drive may be different from that of the medium changer. In order for single_lun to be effective, every scsi_device under a given scsi_target must have it set. This means that there needs to be a blacklist entry for BOTH the medium changer AND the tape drive, which is impractical because some medium changers may be paired with a variety of different tape drive models. It makes more sense to put the single_lun flag in scsi_target instead of scsi_device, which causes every device at a given target ID to inherit the single_lun flag from one LUN. This makes it possible to blacklist just the medium changer and not the tape drive. Signed-off-by: Tony Battersby Signed-off-by: James Bottomley --- include/scsi/scsi_device.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 6c2d80b36aa1..45bb12b54175 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -122,9 +122,6 @@ struct scsi_device { unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ unsigned simple_tags:1; /* simple queue tag messages are enabled */ unsigned ordered_tags:1;/* ordered queue tag messages are enabled */ - unsigned single_lun:1; /* Indicates we should only allow I/O to - * one of the luns for the device at a - * time. */ unsigned was_reset:1; /* There was a bus reset on the bus for * this device */ unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN @@ -202,6 +199,9 @@ struct scsi_target { unsigned int id; /* target id ... replace * scsi_device.id eventually */ unsigned int create:1; /* signal that it needs to be added */ + unsigned int single_lun:1; /* Indicates we should only + * allow I/O to one of the luns + * for the device at a time. */ unsigned int pdt_1f_for_no_lun; /* PDT = 0x1f */ /* means no lun present */ -- cgit v1.2.3-58-ga151