Fix bug in handling return value from decompress routine.

[ppp.git] / ultrix / if_ppp.c

diff --git a/ultrix/if_ppp.c b/ultrix/if_ppp.c
index 2c8316ee2e0b6cda9b2ce39b428a7952dd68099c..9fd9b3151dac89cd3cb6eebddca1d966e13b4d35 100644 (file)
--- a/ultrix/if_ppp.c
+++ b/ultrix/if_ppp.c
@@ -72,7 +72,7 @@
  * Robert Olsson <robert@robur.slu.se> and Paul Mackerras.
  */
 
-/* $Id: if_ppp.c,v 1.7 1995/05/19 04:37:42 paulus Exp $ */
+/* $Id: if_ppp.c,v 1.8 1995/07/11 07:00:49 paulus Exp $ */
 /* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */
 
 #include "ppp.h"
@@ -1120,32 +1120,30 @@ ppp_inproc(sc, m)
        && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) {
        /* decompress this packet */
        rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp);
-       if (dmp != NULL) {
+       if (rv == DECOMP_OK) {
            m_freem(m);
+           if (dmp == NULL) {
+               /* no error, but no decompressed packet produced */
+               return;
+           }
            m = dmp;
            cp = mtod(m, u_char *);
            proto = PPP_PROTOCOL(cp);
 
        } else {
-           /* pass the compressed packet up to pppd, which may take
-              CCP down or issue a Reset-Req. */
+           /*
+            * An error has occurred in decompression.
+            * Pass the compressed packet up to pppd, which may take
+            * CCP down or issue a Reset-Req.
+            */
            if (sc->sc_flags & SC_DEBUG)
                printf("ppp%d: decompress failed %d\n", sc->sc_if.if_unit, rv);
-           s = splimp();
+           s = splhigh();
            sc->sc_flags |= SC_VJ_RESET;
-           switch (rv) {
-           case DECOMP_OK:
-               /* no error, but no decompressed packet produced */
-               splx(s);
-               m_freem(m);
-               return;
-           case DECOMP_ERROR:
+           if (rv == DECOMP_ERROR)
                sc->sc_flags |= SC_DC_ERROR;
-               break;
-           case DECOMP_FATALERROR:
+           else
                sc->sc_flags |= SC_DC_FERROR;
-               break;
-           }
            splx(s);
        }