mwifiex: Log an error on command failure during key-material upload

Sometimes the KEY_MATERIAL command can fail with the 88W8897 firmware
(when this happens exactly seems pretty random). This appears to prevent
the access point from starting, so it seems like a good idea to log an
error in that case.
Signed-off-by: Jonas Dreßler <verdre@v0yd.nl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211016153244.24353-3-verdre@v0yd.nl

drivers/net/wireless/marvell/mwifiex/cfg80211.c

@@ -519,8 +519,14 @@ mwifiex_cfg80211_set_default_mgmt_key(struct wiphy *wiphy,
 	encrypt_key.is_igtk_def_key = true;
 	eth_broadcast_addr(encrypt_key.mac_addr);
 
-	return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_KEY_MATERIAL,
-				HostCmd_ACT_GEN_SET, true, &encrypt_key, true);
+	if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_KEY_MATERIAL,
+			     HostCmd_ACT_GEN_SET, true, &encrypt_key, true)) {
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "Sending KEY_MATERIAL command failed\n");
+		return -1;
+	}
+
+	return 0;
 }
 
 /*