Author: sephe Date: Mon Nov 28 06:53:00 2016 New Revision: 309236 URL: https://svnweb.freebsd.org/changeset/base/309236
Log: hyperv/vmbus: Make sure that the allocated GPADL is not zero. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8631 Modified: head/sys/dev/hyperv/vmbus/vmbus.c Modified: head/sys/dev/hyperv/vmbus/vmbus.c ============================================================================== --- head/sys/dev/hyperv/vmbus/vmbus.c Mon Nov 28 06:40:26 2016 (r309235) +++ head/sys/dev/hyperv/vmbus/vmbus.c Mon Nov 28 06:53:00 2016 (r309236) @@ -325,7 +325,13 @@ vmbus_msghc_wakeup(struct vmbus_softc *s uint32_t vmbus_gpadl_alloc(struct vmbus_softc *sc) { - return atomic_fetchadd_int(&sc->vmbus_gpadl, 1); + uint32_t gpadl; + +again: + gpadl = atomic_fetchadd_int(&sc->vmbus_gpadl, 1); + if (gpadl == 0) + goto again; + return (gpadl); } static int _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
