on uba reset remap already allocated pages

SCCS-vsn: sys/vax/if/if_uba.c 4.11

diff --git a/usr/src/sys/vax/if/if_uba.c b/usr/src/sys/vax/if/if_uba.c
index 39b3a64..c9298a2 100644 (file)
--- a/usr/src/sys/vax/if/if_uba.c
+++ b/usr/src/sys/vax/if/if_uba.c
@@ -1,4 +1,4 @@
-/*     if_uba.c        4.10    82/03/28        */
+/*     if_uba.c        4.11    82/05/19        */

 
 #include "../h/param.h"
 #include "../h/systm.h"
 
 #include "../h/param.h"
 #include "../h/systm.h"


@@ -40,14 +40,18 @@ if_ubainit(ifu, uban, hlen, nmr)
 
 COUNT(IF_UBAINIT);
        ncl = clrnd(nmr + CLSIZE) / CLSIZE;
 
 COUNT(IF_UBAINIT);
        ncl = clrnd(nmr + CLSIZE) / CLSIZE;

-       cp = m_clalloc(2 * ncl, MPG_SPACE);
-       if (cp == 0)
-               return (0);
-       ifu->ifu_hlen = hlen;
-       ifu->ifu_uban = uban;
-       ifu->ifu_uba = uba_hd[uban].uh_uba;
-       ifu->ifu_r.ifrw_addr = cp + CLBYTES - hlen;
-       ifu->ifu_w.ifrw_addr = ifu->ifu_r.ifrw_addr + ncl * CLBYTES;
+       if (ifu->ifu_r.ifrw_addr)
+               cp = ifu->ifu_r.ifrw_addr - (CLBYTES - hlen);
+       else {
+               cp = m_clalloc(2 * ncl, MPG_SPACE);
+               if (cp == 0)
+                       return (0);
+               ifu->ifu_r.ifrw_addr = cp + CLBYTES - hlen;
+               ifu->ifu_w.ifrw_addr = ifu->ifu_r.ifrw_addr + ncl * CLBYTES;
+               ifu->ifu_hlen = hlen;
+               ifu->ifu_uban = uban;
+               ifu->ifu_uba = uba_hd[uban].uh_uba;
+       }

        if (if_ubaalloc(ifu, &ifu->ifu_r, nmr) == 0)
                goto bad;
        if (if_ubaalloc(ifu, &ifu->ifu_w, nmr) == 0)
        if (if_ubaalloc(ifu, &ifu->ifu_r, nmr) == 0)
                goto bad;
        if (if_ubaalloc(ifu, &ifu->ifu_w, nmr) == 0)


@@ -60,6 +64,7 @@ bad2:
        ubarelse(ifu->ifu_uban, &ifu->ifu_r.ifrw_info);
 bad:
        m_pgfree(cp, 2 * ncl);
        ubarelse(ifu->ifu_uban, &ifu->ifu_r.ifrw_info);
 bad:
        m_pgfree(cp, 2 * ncl);

+       ifu->ifu_r.ifrw_addr = 0;

        return (0);
 }
 
        return (0);
 }