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[2a01:c22:7602:4e00:f22f:74ff:fe21:725]) by smtp.googlemail.com with ESMTPSA id n7sm14078357wmq.37.2021.07.17.13.41.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Jul 2021 13:41:13 -0700 (PDT) From: Martin Blumenstingl To: linux-wireless@vger.kernel.org Cc: tony0620emma@gmail.com, kvalo@codeaurora.org, johannes@sipsolutions.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Neo Jou , Jernej Skrabec , Martin Blumenstingl Subject: [PATCH RFC v1 4/7] rtw88: Replace usage of rtw_iterate_keys_rcu() with rtw_iterate_keys() Date: Sat, 17 Jul 2021 22:40:54 +0200 Message-Id: <20210717204057.67495-5-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210717204057.67495-1-martin.blumenstingl@googlemail.com> References: <20210717204057.67495-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org 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 --- 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) {