Author: cem
Date: Thu Apr 6 17:08:59 2017
New Revision: 316582
URL: https://svnweb.freebsd.org/changeset/base/316582
Log:
bwn(4): Fix trivial null dereference
Reported by: PVS-Studio
Sponsored by: Dell EMC Isilon
Modified:
head/sys/dev/bwn/if_bwn.c
Modified: head/sys/dev/bwn/if_bwn.c
==============================================================================
--- head/sys/dev/bwn/if_bwn.c Thu Apr 6 16:22:54 2017 (r316581)
+++ head/sys/dev/bwn/if_bwn.c Thu Apr 6 17:08:59 2017 (r316582)
@@ -6754,10 +6754,15 @@ static void
bwn_txpwr(void *arg, int npending)
{
struct bwn_mac *mac = arg;
- struct bwn_softc *sc = mac->mac_sc;
+ struct bwn_softc *sc;
+
+ if (mac == NULL)
+ return;
+
+ sc = mac->mac_sc;
BWN_LOCK(sc);
- if (mac && mac->mac_status >= BWN_MAC_STATUS_STARTED &&
+ if (mac->mac_status >= BWN_MAC_STATUS_STARTED &&
mac->mac_phy.set_txpwr != NULL)
mac->mac_phy.set_txpwr(mac);
BWN_UNLOCK(sc);
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