Author: np
Date: Sun Aug 6 19:45:59 2017
New Revision: 322123
URL: https://svnweb.freebsd.org/changeset/base/322123
Log:
cxgbe(4): Avoid a NULL dereference that would occur during module unload
if there were problems earlier during attach.
MFC after: 3 days
Sponsored by: Chelsio Communications
Modified:
head/sys/dev/cxgbe/t4_sched.c
Modified: head/sys/dev/cxgbe/t4_sched.c
==============================================================================
--- head/sys/dev/cxgbe/t4_sched.c Sun Aug 6 16:12:56 2017
(r322122)
+++ head/sys/dev/cxgbe/t4_sched.c Sun Aug 6 19:45:59 2017
(r322123)
@@ -382,8 +382,10 @@ t4_free_tx_sched(struct adapter *sc)
taskqueue_drain(taskqueue_thread, &sc->tc_task);
- for_each_port(sc, i)
- free(sc->port[i]->sched_params, M_CXGBE);
+ for_each_port(sc, i) {
+ if (sc->port[i] != NULL)
+ free(sc->port[i]->sched_params, M_CXGBE);
+ }
if (mtx_initialized(&sc->tc_lock))
mtx_destroy(&sc->tc_lock);
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