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[SCSI] add SCSI_UNKNOWN and LUN transfer limit restrictions

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Original From: Ingo Flaschberger <if@xip.at>

To support the RA4100 array from Compaq.

This patch now correctly handles SCSI_UNKNOWN types with regard to
BLIST_REPORTLUNS2 (allow it) and cdb[1] LUN inclusion (don't).

It also allows a BLIST_MAX_512 flag to restrict the maximum transfer
length to 512 blocks (apparently this is an RA4100 problem).

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley
2006-03-31 20:07:45 -06:00
committed by James Bottomley
parent d637c4543f
commit 4d7db04a7a
4 changed files with 21 additions and 6 deletions
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3
drivers/scsi/scsi.c
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@@ -565,7 +565,8 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd)
/*
* If SCSI-2 or lower, store the LUN value in cmnd.
*/
if (cmd->device->scsi_level <= SCSI_2) {
if (cmd->device->scsi_level <= SCSI_2 &&
cmd->device->scsi_level != SCSI_UNKNOWN) {
cmd->cmnd[1] = (cmd->cmnd[1] & 0x1f) |
(cmd->device->lun << 5 & 0xe0);
}