[PATCH wireless-next 01/28] wifi: iwlwifi: mld: Check for NULL before lookup.

[greearb@candelatech.com]

From: Ben Greear <greearb@candelatech.com>

Do not call iwl_mld_sta_from_mac80211(sta) unless we have
verified sta is non NULL.

Signed-off-by: Ben Greear <greearb@candelatech.com>
---
 drivers/net/wireless/intel/iwlwifi/mld/agg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mld/agg.c b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
index 3bf36f8f6874..a757077b0a7a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/agg.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
@@ -194,7 +194,7 @@ iwl_mld_reorder(struct iwl_mld *mld, struct napi_struct *napi,
 	struct iwl_mld_baid_data *baid_data;
 	struct iwl_mld_reorder_buffer *buffer;
 	struct iwl_mld_reorder_buf_entry *entries;
-	struct iwl_mld_sta *mld_sta = iwl_mld_sta_from_mac80211(sta);
+	struct iwl_mld_sta *mld_sta;
 	struct iwl_mld_link_sta *mld_link_sta;
 	u32 reorder = le32_to_cpu(desc->reorder_data);
 	bool amsdu, last_subframe, is_old_sn, is_dup;
@@ -221,6 +221,8 @@ iwl_mld_reorder(struct iwl_mld *mld, struct napi_struct *napi,
 		      "Got valid BAID without a valid station assigned\n"))
 		return IWL_MLD_PASS_SKB;
 
+	mld_sta = iwl_mld_sta_from_mac80211(sta);
+
 	/* not a data packet */
 	if (!ieee80211_is_data_qos(hdr->frame_control) ||
 	    is_multicast_ether_addr(hdr->addr1))
-- 
2.42.0