From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CAF0FC47077 for ; Fri, 12 Jan 2024 02:14:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=H8jZQKFqiToGjRvO++UsXFG0NwTZnUKtsLsyPoVctyc=; b=2XSurT7+gjYCkN AHzmKtUnMwqPXPqSPPaveDRJgadHPDnNIpDsJGuur2LqQEDoGQeR0E0BwHN5cRGov1RNBh0WCVKAe KicgDFQzjEDfOqwz4WQBq7JSdu8EztASILjgiWZlorIst3D2If1NU7uF7GAl7xdQTUWZv7dV1i/YJ lGxfdlSpTzdC5/ctMlMlz39vnzelvC0Uh83BF/JRwyUyGH9HXXA/PrBC+OHMUCl0ISW5aAwQIxLTk iruSpI41VINOLOO3hITaagRIcn5ehM+J1vzv2N3L3gi+1Sud/tmA/HYVxR3dMA8ueV1RRI2OjXDM2 BRpdrfzCB+Cep7IwS88g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rO73x-001fqT-2Z; Fri, 12 Jan 2024 02:14:25 +0000 Received: from smtpbg156.qq.com ([15.184.82.18]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rO73t-001fpS-0n for linux-arm-kernel@lists.infradead.org; Fri, 12 Jan 2024 02:14:23 +0000 X-QQ-mid: bizesmtp89t1705025574tnmsr8zo Received: from localhost.localdomain ( [123.114.60.34]) by bizesmtp.qq.com (ESMTP) with id ; Fri, 12 Jan 2024 10:12:52 +0800 (CST) X-QQ-SSF: 01400000000000D0L000000A0000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 11340837925048711146 From: Qiang Ma To: alexandre.torgue@foss.st.com, joabreu@synopsys.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, mcoquelin.stm32@gmail.com Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Qiang Ma Subject: [PATCH] net: stmmac: ethtool: Fixed calltrace caused by unbalanced disable_irq_wake calls Date: Fri, 12 Jan 2024 10:12:49 +0800 Message-Id: <20240112021249.24598-1-maqianga@uniontech.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:uniontech.com:qybglogicsvrsz:qybglogicsvrsz4a-0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240111_181421_864936_7AA8D953 X-CRM114-Status: GOOD ( 13.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org We found the following dmesg calltrace when testing the GMAC NIC notebook: [9.448656] ------------[ cut here ]------------ [9.448658] Unbalanced IRQ 43 wake disable [9.448673] WARNING: CPU: 3 PID: 1083 at kernel/irq/manage.c:688 irq_set_irq_wake+0xe0/0x128 [9.448717] CPU: 3 PID: 1083 Comm: ethtool Tainted: G O 4.19 #1 [9.448773] ... [9.448774] Call Trace: [9.448781] [<9000000000209b5c>] show_stack+0x34/0x140 [9.448788] [<9000000000d52700>] dump_stack+0x98/0xd0 [9.448794] [<9000000000228610>] __warn+0xa8/0x120 [9.448797] [<9000000000d2fb60>] report_bug+0x98/0x130 [9.448800] [<900000000020a418>] do_bp+0x248/0x2f0 [9.448805] [<90000000002035f4>] handle_bp_int+0x4c/0x78 [9.448808] [<900000000029ea40>] irq_set_irq_wake+0xe0/0x128 [9.448813] [<9000000000a96a7c>] stmmac_set_wol+0x134/0x150 [9.448819] [<9000000000be6ed0>] dev_ethtool+0x1368/0x2440 [9.448824] [<9000000000c08350>] dev_ioctl+0x1f8/0x3e0 [9.448827] [<9000000000bb2a34>] sock_ioctl+0x2a4/0x450 [9.448832] [<900000000046f044>] do_vfs_ioctl+0xa4/0x738 [9.448834] [<900000000046f778>] ksys_ioctl+0xa0/0xe8 [9.448837] [<900000000046f7d8>] sys_ioctl+0x18/0x28 [9.448840] [<9000000000211ab4>] syscall_common+0x20/0x34 [9.448842] ---[ end trace 40c18d9aec863c3e ]--- Multiple disable_irq_wake() calls will keep decreasing the IRQ wake_depth, When wake_depth is 0, calling disable_irq_wake() again, will report the above calltrace. Due to the need to appear in pairs, we cannot call disable_irq_wake() without calling enable_irq_wake(). Fix this by making sure there are no unbalanced disable_irq_wake() calls. Signed-off-by: Qiang Ma --- drivers/net/ethernet/stmicro/stmmac/stmmac.h | 1 + drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c | 10 ++++++++-- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 1 + 3 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index cd7a9768de5f..b8c93b881a65 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -255,6 +255,7 @@ struct stmmac_priv { u32 msg_enable; int wolopts; int wol_irq; + bool wol_irq_disabled; int clk_csr; struct timer_list eee_ctrl_timer; int lpi_irq; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c index f628411ae4ae..9a4d9492a781 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c @@ -825,10 +825,16 @@ static int stmmac_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) if (wol->wolopts) { pr_info("stmmac: wakeup enable\n"); device_set_wakeup_enable(priv->device, 1); - enable_irq_wake(priv->wol_irq); + /* Avoid unbalanced enable_irq_wake calls */ + if (priv->wol_irq_disabled) + enable_irq_wake(priv->wol_irq); + priv->wol_irq_disabled = false; } else { device_set_wakeup_enable(priv->device, 0); - disable_irq_wake(priv->wol_irq); + /* Avoid unbalanced disable_irq_wake calls */ + if (!priv->wol_irq_disabled) + disable_irq_wake(priv->wol_irq); + priv->wol_irq_disabled = true; } mutex_lock(&priv->lock); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 37e64283f910..baa396621ed8 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -3565,6 +3565,7 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev) /* Request the Wake IRQ in case of another line * is used for WoL */ + priv->wol_irq_disabled = true; if (priv->wol_irq > 0 && priv->wol_irq != dev->irq) { int_name = priv->int_name_wol; sprintf(int_name, "%s:%s", dev->name, "wol"); -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel