diff options
Diffstat (limited to 'sys/net/if_sl.c')
| -rw-r--r-- | sys/net/if_sl.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/sys/net/if_sl.c b/sys/net/if_sl.c index 228f396..c2e0e17 100644 --- a/sys/net/if_sl.c +++ b/sys/net/if_sl.c @@ -83,6 +83,7 @@ #include <sys/kernel.h> #include <sys/conf.h> #include <sys/module.h> +#include <sys/proc.h> #include <net/if.h> #include <net/if_types.h> @@ -1076,9 +1077,13 @@ sl_keepalive(chan) struct sl_softc *sc = chan; if (sc->sc_keepalive) { - if (sc->sc_flags & SC_KEEPALIVE) - pgsignal (sc->sc_ttyp->t_pgrp, SIGURG, 1); - else + if (sc->sc_flags & SC_KEEPALIVE) { + if (sc->sc_ttyp->t_pgrp != NULL) { + PGRP_LOCK(sc->sc_ttyp->t_pgrp); + pgsignal (sc->sc_ttyp->t_pgrp, SIGURG, 1); + PGRP_UNLOCK(sc->sc_ttyp->t_pgrp); + } + } else sc->sc_flags |= SC_KEEPALIVE; sc->sc_kahandle = timeout(sl_keepalive, sc, sc->sc_keepalive); } else { |
