[SCSI] aic7xxx: fix U160 mode

The new period/dt setting routines don't get the coupling of these
parameters correct.  This means that Domain Validation never gets DT
set, and thus the drive gets restricted to U80.

Fix this by restoring the couplings in the set routines.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index b216de41bff4c138bb41d9d66e421ad7900d9a0f..f90efa265ba276d8cdd47235822f3c55ee102705 100644 (file)
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -2679,6 +2679,11 @@ static void ahc_linux_set_period(struct scsi_target *starget, int period)
        if (offset == 0)
                offset = MAX_OFFSET;
 
+       if (period < 9)
+               period = 9;     /* 12.5ns is our minimum */
+       if (period == 9)
+               ppr_options |= MSG_EXT_PPR_DT_REQ;
+
        ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
                            starget->channel + 'A', ROLE_INITIATOR);
 
@@ -2764,6 +2769,12 @@ static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
        unsigned long flags;
        struct ahc_syncrate *syncrate;
 
+       if (dt) {
+               period = 9;     /* 12.5ns is the only period valid for DT */
+               ppr_options |= MSG_EXT_PPR_DT_REQ;
+       } else if (period == 9)
+               period = 10;    /* if resetting DT, period must be >= 25ns */
+
        ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
                            starget->channel + 'A', ROLE_INITIATOR);
        syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);