[PATCH RFC v1 4/7] rtw88: Replace usage of rtw_iterate_keys_rcu() with rtw_iterate_keys()
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: 2021-07-17 20:41:51
Also in:
lkml, netdev
Subsystem:
realtek wireless driver (rtw88), the rest · Maintainers:
Ping-Ke Shih, Linus Torvalds
Upcoming SDIO support may sleep in the read/write handlers. The only occurrence of rtw_iterate_keys_rcu() reads and writes registers from it's iterator function. Replace it with rtw_iterate_keys() (the non-RCU version). This will prevent an "scheduling while atomic" issue when using an SDIO device. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> --- drivers/net/wireless/realtek/rtw88/main.c | 4 +--- drivers/net/wireless/realtek/rtw88/util.h | 2 -- 2 files changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 6e0d25f0afe3..e40432b1dcee 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c@@ -574,9 +574,7 @@ static void __fw_recovery_work(struct rtw_dev *rtwdev) WARN(1, "firmware crash, start reset and recover\n"); - rcu_read_lock(); - rtw_iterate_keys_rcu(rtwdev, NULL, rtw_reset_key_iter, rtwdev); - rcu_read_unlock(); + rtw_iterate_keys(rtwdev, NULL, rtw_reset_key_iter, rtwdev); rtw_iterate_stas(rtwdev, rtw_reset_sta_iter, rtwdev); rtw_iterate_vifs(rtwdev, rtw_reset_vif_iter, rtwdev); rtw_enter_ips(rtwdev);
diff --git a/drivers/net/wireless/realtek/rtw88/util.h b/drivers/net/wireless/realtek/rtw88/util.h
index b0dfadf8b82a..06a5b4c4111c 100644
--- a/drivers/net/wireless/realtek/rtw88/util.h
+++ b/drivers/net/wireless/realtek/rtw88/util.h@@ -19,8 +19,6 @@ struct rtw_dev; ieee80211_iterate_stations_atomic(rtwdev->hw, iterator, data) #define rtw_iterate_keys(rtwdev, vif, iterator, data) \ ieee80211_iter_keys(rtwdev->hw, vif, iterator, data) -#define rtw_iterate_keys_rcu(rtwdev, vif, iterator, data) \ - ieee80211_iter_keys_rcu((rtwdev)->hw, vif, iterator, data) static inline u8 *get_hdr_bssid(struct ieee80211_hdr *hdr) {
--
2.32.0