From c752cac9db1b0c469db7ba9d17af4ba708984db5 Mon Sep 17 00:00:00 2001
From: Yan-Hsuan Chuang <yhchuang@realtek.com>
Date: Tue, 23 Oct 2018 11:24:44 +0800
Subject: [PATCH] mac80211: fix GFP_KERNEL under tasklet context
Git-commit: c752cac9db1b0c469db7ba9d17af4ba708984db5
Patch-mainline: v4.20-rc6
References: FATE#326294

cfg80211_sta_opmode_change_notify needs a gfp_t flag to hint the nl80211
stack when allocating new skb, but it is called under tasklet context
here with GFP_KERNEL and kernel will yield a warning about it.

Cc: stable@vger.kernel.org
Fixes: ff84e7bfe176 ("mac80211: Add support to notify ht/vht opmode modification.")
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 net/mac80211/rx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 3bd3b5769797..a69ecfb212ed 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -3063,7 +3063,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
 			cfg80211_sta_opmode_change_notify(sdata->dev,
 							  rx->sta->addr,
 							  &sta_opmode,
-							  GFP_KERNEL);
+							  GFP_ATOMIC);
 			goto handled;
 		}
 		case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
@@ -3100,7 +3100,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
 			cfg80211_sta_opmode_change_notify(sdata->dev,
 							  rx->sta->addr,
 							  &sta_opmode,
-							  GFP_KERNEL);
+							  GFP_ATOMIC);
 			goto handled;
 		}
 		default:
-- 
2.19.2