let isp(4) refuse to let the midlayer use high luns

[David Gwynne]

...so the io path doesnt have to do it EVERY TIME FOR EVERY IO.


Index: isp_openbsd.c
===================================================================
RCS file: /cvs/src/sys/dev/ic/isp_openbsd.c,v
retrieving revision 1.45
diff -u -p -r1.45 isp_openbsd.c
--- isp_openbsd.c       31 Dec 2010 19:20:42 -0000      1.45
+++ isp_openbsd.c       5 Apr 2011 11:28:57 -0000
@@ -61,6 +61,7 @@
 #define        _XT(xs) ((((xs)->timeout/1000) * hz) + (3 * hz))
 
 static void ispminphys(struct buf *, struct scsi_link *);
+static int isp_scsi_probe(struct scsi_link *);
 static void ispcmd_slow(XS_T *);
 static void ispcmd(XS_T *);
 
@@ -94,6 +95,7 @@ isp_attach(struct ispsoftc *isp)
        struct scsibus_attach_args saa;
        struct scsi_link *lptr = &isp->isp_osinfo._link[0];
        isp->isp_osinfo._adapter.scsi_minphys = ispminphys;
+       isp->isp_osinfo._adapter.dev_probe = isp_scsi_probe;
 
        isp->isp_state = ISP_RUNSTATE;
 
@@ -283,6 +285,17 @@ isp_add2_blocked_queue(struct ispsoftc *
        xs->free_list.le_next = NULL;
 }
 
+int
+isp_scsi_probe(struct scsi_link *link)
+{
+       struct ispsoftc *isp = (struct ispsoftc *)link->adapter_softc;
+
+       if (link->lun >= isp->isp_maxluns)
+               return (ENXIO);
+
+       return (0);
+}
+
 void
 ispcmd(XS_T *xs)
 {
@@ -298,13 +311,6 @@ ispcmd(XS_T *xs)
 
        ISP_LOCK(isp);
 
-       if (XS_LUN(xs) >= isp->isp_maxluns) {
-               xs->error = XS_SELTIMEOUT;
-               scsi_done(xs);
-               ISP_UNLOCK(isp);
-               return;
-       }
-
        if (isp->isp_state < ISP_RUNSTATE) {
                ISP_DISABLE_INTS(isp);
                isp_init(isp);