From d2ab7f00f4321370a8ee14e5630d4349fdacc42e Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sun, 9 Aug 2020 11:29:06 +0200
Subject: [PATCH] mwifiex: Do not use GFP_KERNEL in atomic context
Git-commit: d2ab7f00f4321370a8ee14e5630d4349fdacc42e
Patch-mainline: v5.10-rc1
References: git-fixes
A possible call chain is as follow:
mwifiex_sdio_interrupt (sdio.c)
--> mwifiex_main_process (main.c)
--> mwifiex_process_cmdresp (cmdevt.c)
--> mwifiex_process_sta_cmdresp (sta_cmdresp.c)
--> mwifiex_ret_802_11_scan (scan.c)
--> mwifiex_parse_single_response_buf (scan.c)
'mwifiex_sdio_interrupt()' is an interrupt function.
Also note that 'mwifiex_ret_802_11_scan()' already uses GFP_ATOMIC.
So use GFP_ATOMIC instead of GFP_KERNEL when memory is allocated in
'mwifiex_parse_single_response_buf()'.
Fixes: 7c6fa2a843c5 ("mwifiex: use cfg80211 dynamic scan table and cfg80211_get_bss API")
or
Fixes: 601216e12c65e ("mwifiex: process RX packets in SDIO IRQ thread directly")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200809092906.744621-1-christophe.jaillet@wanadoo.fr
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/marvell/mwifiex/scan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c b/drivers/net/wireless/marvell/mwifiex/scan.c
index ff932627a46c..2fb69a590bd8 100644
--- a/drivers/net/wireless/marvell/mwifiex/scan.c
+++ b/drivers/net/wireless/marvell/mwifiex/scan.c
@@ -1889,7 +1889,7 @@ mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
chan, CFG80211_BSS_FTYPE_UNKNOWN,
bssid, timestamp,
cap_info_bitmap, beacon_period,
- ie_buf, ie_len, rssi, GFP_KERNEL);
+ ie_buf, ie_len, rssi, GFP_ATOMIC);
if (bss) {
bss_priv = (struct mwifiex_bss_priv *)bss->priv;
bss_priv->band = band;
--
2.16.4