From patchwork Sat Jan 8 00:55:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Blumenstingl X-Patchwork-Id: 12707197 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BA2BCC433F5 for ; Sat, 8 Jan 2022 00:56:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232486AbiAHA4U (ORCPT ); Fri, 7 Jan 2022 19:56:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232135AbiAHAzz (ORCPT ); Fri, 7 Jan 2022 19:55:55 -0500 Received: from mail-wr1-x42c.google.com (mail-wr1-x42c.google.com [IPv6:2a00:1450:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F805C06173E; Fri, 7 Jan 2022 16:55:54 -0800 (PST) Received: by mail-wr1-x42c.google.com with SMTP id w20so14097544wra.9; Fri, 07 Jan 2022 16:55:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=qYRAJooeejsLElKVR8lduV1KN6qXlfQTHsLzXUd3d6g=; b=ouxrwHpNjIGM+LMQA2WDKhHbWEPuw92qkfHyFDK3qYXt2dB3mKCsqTwbt9l9nNNmtu XCLZDlW0yzOYAapvXNBgS3d0fvZLLiPkEP2t+CvNv43PRrWFEePtraVKqOaA193YazrZ JBiVwsADnRVi31c4aeBpmkW0XDRv346tN1g0tX8fzpXssrO3kmLDB2mkzO1VR7FeKUae pxI/mRrLl7FjN1b9va9guxgMjMW/sUf5KlJlhffPFlI8B/bTD2rOM5dlerImS3/OD+P3 L+vg4a0PjBEF2MbanOPRzsrcYA6lnzPWI2IIEfjsSjX7d433SBQfxSc2kKZdI7N7WFic gxtg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=qYRAJooeejsLElKVR8lduV1KN6qXlfQTHsLzXUd3d6g=; b=pW6ucCA839am10YcJL7zgTVmKvfTfWdiJ45c7zwHA5VC0vK9Q3Eacbzcx7m2qhNo0y 8dB6WO3onbfJTs3oGu9UsQVkA049L1J3CPHbMMyDWAN8wZuy1ubvrrma5IPa0UEQt8Bl tYkbC3DXJTWKuAve42599xIk2PUTelHEJUarMbKgZEV6geetV4bjbpcVKhLWRYkDEyaU Vwam++S/rCJcF/ski59mJM48IHfDcui25noZ07nLgjH0iCHKQErwMcA+E05vn++DmXXr qR0//iflozBsiwvq/eQ4wc3PesdYBr6Ona8dSW7SaDDtJ4CntgJcTCVqomE08hErYGsU IRbw== X-Gm-Message-State: AOAM533MtsZYWUkOiBQKKhhzE2CzkQn8IWjef8EEfSz/iRE0LBwl24rV 5LbQzdkqoZlGFYy1T4sQiBdOnUhyZc4= X-Google-Smtp-Source: ABdhPJwJJ13t6pOnsUqETHnSbhHtqaSiPpIlTgAEf9at9sLUTTzkciB0CMZyZf5hOYHbRZMkwlFV4w== X-Received: by 2002:a5d:64a7:: with SMTP id m7mr55004041wrp.687.1641603353047; Fri, 07 Jan 2022 16:55:53 -0800 (PST) Received: from localhost.localdomain (dynamic-095-117-123-222.95.117.pool.telefonica.de. [95.117.123.222]) by smtp.googlemail.com with ESMTPSA id z6sm77357wmp.9.2022.01.07.16.55.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Jan 2022 16:55:52 -0800 (PST) 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 , Pkshih , Ed Swierk , Martin Blumenstingl Subject: [PATCH v3 5/8] rtw88: Replace usage of rtw_iterate_keys_rcu() with rtw_iterate_keys() Date: Sat, 8 Jan 2022 01:55:30 +0100 Message-Id: <20220108005533.947787-6-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220108005533.947787-1-martin.blumenstingl@googlemail.com> References: <20220108005533.947787-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@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 4b28c81b3ca0..3d4257e0367a 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -581,9 +581,7 @@ 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) {