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-rw-r--r--drivers/scsi/scsi.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 32979fe..73994e2 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -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);
}