From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f13.google.com (mail-oi2-f13.google.com [74.125.231.205]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 69B094E0B86 for ; Mon, 21 Sep 2026 16:54:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790009652; cv=none; b=FNomdwY+mZAg7RjUQe7EeYmGlpawjuhYkJ+4XOkhEt36d3HxpNFMnXPt6AKwKsCRbLb4chG2HUmLTFQrMcDoOGiBmdpMhBIhohHBg810x7ZM16WJ5NSFF8PRszx0M2kfy61kQTUrT5gNLEeV8XgH37JPbgvShaYOhAnzD9jrRlI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790009652; c=relaxed/simple; bh=1qgx7WO1ODz0uzZ0PV4p/UIMKqQiae0iH1KRXidMcvY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=UwzYxkwT/XFPu3OqkR8S0VQyxL7W1BLmxLYu8WMND4QbdORftJKW5J+i8Bg+K021ambde8ID8oNnFtXkk9lXpC0oEAKPlh1iMlze/cw295BcNVXKgT+qnW0JKXkXY/A7wZKqr85VSf1UZDDHS5tTQLDfrKcKn/+G7o4bMIhAg2Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=TzRYSL0o; arc=none smtp.client-ip=74.125.231.205 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="TzRYSL0o" Received: by mail-oi2-f13.google.com with SMTP id 46e09a7af769-804f7045f3eso1183612a34.2 for ; Mon, 21 Sep 2026 09:54:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1790009648; x=1790614448; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=tvfdmXPJ30DEketzEq5aXVKBwOS7ewPYMj6rBpY0hhM=; b=TzRYSL0o+MpnwNBRJpqqA0Jzs+X+BizeBR8Xs4t/NZDUnnjVj/IPAgy+bMB0mEaBjJ fFL1VPPamn21NLHMGuA1qas1GqibT8ksabxhUoWfniQBvynsJces+DeL157WMjxwoYiF yuE2QKY8/gvogRsntZabuP0YSmBQ8mge4BkYHLnTOjxfHYNz6J4jimucok2MSt48tKyI etnqLkaLRsdwlGUT21xHuENi3hfcLDsMWVd2tWHYA2CyJrIrWgg8JvRg6QxMlEH6Z1p3 TsvShJsG2gze47Us3D2zh1vB53JodlwmulORilbuiZ7dfaHbWWife/0dvvVi0Tn/bmZB WasA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790009648; x=1790614448; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=tvfdmXPJ30DEketzEq5aXVKBwOS7ewPYMj6rBpY0hhM=; b=wZKzeBiBZKXP9D4tNVLhnfcuXiC1L/GRkyUDcOn/eIxtK3gpKxszKzuu6sRSPy2eYQ jVI91BU7Y0aJ92oNL+01ppyTQguQMGQX+nD5k6tv89UXQqiC+hrLmax0ziPtcKtDC3qw FkVUiRpoiuo05l/s6U8lZE104HZexffXPK0E6QGuubZk+nP1ZToNlJbODOjJnDGRD9X3 YrBwOyZJlCEZk7x0E7zkoftRWUn1H613VZbOErKsCADw/o5k1yZREzheR8W7JS3PwPb5 GBn2U199PD0WJtr9ufuEPsQRmguEGeVIs7HGcvkCkQPxcOaIaDVLHHkpN2EfubGZhvZx 4maA== X-Forwarded-Encrypted: i=1; AKwUvBxQAltGrjg4/pCdaa8Na5Dy6SwdAm9LcE+7mIU9BjFFGMMcFENYXimb2XVI4WFncLByZDGlhuHC2z9pfrA=@vger.kernel.org X-Gm-Message-State: AFuF++lTSApFYo5hq1b/TA+YP8PberjX8g58mDTHmtNsveq9dZkcwEq0 G5KQtYX1EZf43ZiExOsOV3ae3NTb2Id6pnosHfEOkBLaq/1acWp030Ru X-Gm-Gg: AYBFou08ir9TfEF86Ib2gxSC8KzSMtJJdJSl6tk/sGpuPkT7f9FvEjCnI8wFtwc3wfR k53+phEPncz2OOkQGCIsTaaKEUOZ9UHC5hSO/6+GPU9opTRygm7MmjU178sFcpB0+by8yHGG7ux 9uYoWbN0U5F1bsOcgNbZ/F1QkKL5vQ5qYpcg+QvOgC91wiEbFAKHteuCI5RGZ1xAOLFgn8X6Xp5 fC2uXpXEO/l3QsuIgAUkZsAQX+QRVBslG9A1HkNDncpiaLYRJgDV/C7v4G/fSoZpX4obmeJZzCU Z1DtLj0W8Vtoe8B9t/ajQLXh2zmpQIWc1nis6DRZOW1GLSrAJFY6V04ADw1LHbaj4AIws5/Qdmz 5apFWMqqZYGJrmZDLF4p3TyfgvRe8uaAmXm4J/dgCuMGKhu6Y876M4UsSG1GF/Vb572sCt2gow/ 5p7QgybBC7jKPZRh1X5OLGvjUZLQUt1OngO49w5M8cGQBfiLuxUW9X++aQNLfqOWFLeZlazbADL KFmGNWQln9pAjMgy2D/11wZllg23uyz2SFws3Hq8SF6J9ljvmTS0TgXZUPDhRpkfKDsW5yFMiAg zBLMyvhKkFqPs5W9R70fTvCbo/Om6y2UNf4utaQYwDzkjlsxSNzk7fpFTKWiCufZBqF6kh8RkbQ RvuTq0chLMHX8iHCEHFbGfw== X-Received: by 2002:a05:6820:f00b:b0:6bd:760a:a8ce with SMTP id 006d021491bc7-6ca9d451e13mr9761450eaf.62.1790009648212; Mon, 21 Sep 2026 09:54:08 -0700 (PDT) Received: from [127.0.1.1] (174-29-1-49.hlrn.qwest.net. [174.29.1.49]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-6d145bc40e6sm510481eaf.5.2026.09.21.09.54.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Sep 2026 09:54:07 -0700 (PDT) From: James Hilliard Date: Mon, 21 Sep 2026 10:54:04 -0600 Subject: [PATCH net 3/3] net: stmmac: close the interface after failed hardware resume Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260921-submit-stmmac-reset-fixes-v1-v1-3-87a4e431ee00@gmail.com> References: <20260921-submit-stmmac-reset-fixes-v1-v1-0-87a4e431ee00@gmail.com> In-Reply-To: <20260921-submit-stmmac-reset-fixes-v1-v1-0-87a4e431ee00@gmail.com> To: Russell King , Andrew Lunn , Heiner Kallweit , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Joakim Zhang , "Russell King (Oracle)" , Maxime Chevallier , Andrew Lunn , Maxime Coquelin , Alexandre Torgue , Christian Marangi , Tiezhu Yang , Huacai Chen Cc: Richard Genoud , Alastair D'Silva , Maxime Ripard , James Hilliard , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org X-Mailer: b4 0.15.2 System suspend disables NAPI and suspends phylink but retains the IRQs and DMA resources. If hardware setup fails during resume, the interface remains administratively up with NAPI still disabled. Closing it later calls napi_disable() a second time and can hang indefinitely. On hardware-setup failure, stop DMA and disable the MAC, then release the suspended data path without repeating NAPI disable. Stop phylink directly from its suspended state rather than restarting the link on hardware which failed to resume. Drop the driver mutex before teardown, retaining RTNL across cleanup and network-core close. Close the netdev to detach the PHY, release its runtime-PM reference and clear its administrative state. Reattach the now-down netdev so a later open can allocate new resources and retry. Preserve the original resume error and leave successful resume unchanged. Fixes: 6896c2449a18 ("net: stmmac: Check stmmac_hw_setup() in stmmac_resume()") Signed-off-by: James Hilliard --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 29 ++++++++++++++++------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 44b59d0f56b5..87cb0978ed6a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4245,7 +4245,7 @@ static int stmmac_open(struct net_device *dev) return ret; } -static void __stmmac_release(struct net_device *dev) +static void __stmmac_release(struct net_device *dev, bool napi_disabled) { struct stmmac_priv *priv = netdev_priv(dev); u8 chan; @@ -4258,7 +4258,9 @@ static void __stmmac_release(struct net_device *dev) /* Stop and disconnect the PHY */ phylink_stop(priv->phylink); - stmmac_disable_all_queues(priv); + /* Suspend has already disabled NAPI when hardware resume fails. */ + if (!napi_disabled) + stmmac_disable_all_queues(priv); for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) hrtimer_cancel(&priv->dma_conf.tx_queue[chan].txtimer); @@ -4297,7 +4299,7 @@ static int stmmac_release(struct net_device *dev) if (device_may_wakeup(priv->device)) phylink_speed_down(priv->phylink, false); - __stmmac_release(dev); + __stmmac_release(dev, false); stmmac_legacy_serdes_power_down(priv); phylink_disconnect_phy(priv->phylink); @@ -6174,7 +6176,7 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu) return PTR_ERR(dma_conf); } - __stmmac_release(dev); + __stmmac_release(dev, false); ret = __stmmac_open(dev, dma_conf); if (ret) { @@ -8356,10 +8358,7 @@ int stmmac_resume(struct device *dev) ret = stmmac_hw_setup(ndev); if (ret < 0) { netdev_err(priv->dev, "%s: Hw setup failed\n", __func__); - stmmac_legacy_serdes_power_down(priv); - mutex_unlock(&priv->lock); - rtnl_unlock(); - return ret; + goto error_stop_dma; } stmmac_init_timestamping(priv); @@ -8386,6 +8385,20 @@ int stmmac_resume(struct device *dev) netif_device_attach(ndev); return 0; + +error_stop_dma: + stmmac_stop_all_dma(priv); + stmmac_mac_set(priv, priv->ioaddr, false); + mutex_unlock(&priv->lock); + /* Release the suspended data path before ndo_stop(), which must not + * disable NAPI or free these resources a second time. + */ + __stmmac_release(ndev, true); + netif_close(ndev); + netif_device_attach(ndev); + rtnl_unlock(); + + return ret; } EXPORT_SYMBOL_GPL(stmmac_resume); -- 2.53.0