[OEM-B][SRU][PATCH 06/11] rsi: Add null check for virtual interfaces in wowlan config

[Shrirang Bagul]

From: Sanjay Kumar Konduri <sanjay.konduri at redpinesignals.com>

BugLink: https://bugs.launchpad.net/bugs/1782070

When the "poweroff" command is executed after wowlan enabled, we have
observed a system crash. In the system "poweroff" sequence, network-manager
is sent to inactive state by cleaning up the network interfaces, using
rsi_mac80211_remove_interface() and when driver tries to access those
network interfaces in rsi_wowlan_config() which was invoked by SDIO
shutdown, results in a crash. Added a NULL check before accessing the
network interfaces in rsi_wowlan_config().

Signed-off-by: Sanjay Kumar Konduri <sanjay.konduri at redpinesignals.com>
Signed-off-by: Siva Rebbagondla <siva.rebbagondla at redpinesignals.com>
Signed-off-by: Sushant Kumar Mishra <sushant.mishra at redpinesignals.com>
Signed-off-by: Kalle Valo <kvalo at codeaurora.org>
(backported from commit 54b5172087aeae61150835c91e68f084a9644f1c)
Signed-off-by: Shrirang Bagul <shrirang.bagul at canonical.com>
---
 drivers/net/wireless/rsi/rsi_91x_mac80211.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/rsi/rsi_91x_mac80211.c b/drivers/net/wireless/rsi/rsi_91x_mac80211.c
index 33f0df4030c9..890790c5b1e4 100644
--- a/drivers/net/wireless/rsi/rsi_91x_mac80211.c
+++ b/drivers/net/wireless/rsi/rsi_91x_mac80211.c
@@ -1934,7 +1934,7 @@ int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
 	struct rsi_common *common = adapter->priv;
 	u16 triggers = 0;
 	u16 rx_filter_word = 0;
-	struct ieee80211_bss_conf *bss;
+	struct ieee80211_bss_conf *bss = NULL;
 
 	rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
 
-- 
2.17.1