From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vladimir Zapolskiy Subject: [PATCH v2 08/14] ravb: fix invalid context bug while calling auto-negotiation by ethtool Date: Wed, 4 Jul 2018 11:14:50 +0300 Message-ID: <20180704081451.7482-4-vladimir_zapolskiy@mentor.com> References: <20180704081245.7395-1-vladimir_zapolskiy@mentor.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Andrew Lunn , Geert Uytterhoeven , , To: Sergei Shtylyov , "David S . Miller" Return-path: Received: from relay1.mentorg.com ([192.94.38.131]:42833 "EHLO relay1.mentorg.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933746AbeGDIP0 (ORCPT ); Wed, 4 Jul 2018 04:15:26 -0400 In-Reply-To: <20180704081245.7395-1-vladimir_zapolskiy@mentor.com> Sender: netdev-owner@vger.kernel.org List-ID: Since commit 35b5f6b1a82b ("PHYLIB: Locking fixes for PHY I/O potentially sleeping") phy_start_aneg() function utilizes a mutex to serialize changes to phy state, however the helper function is called in atomic context. The bug can be reproduced by running "ethtool -r" command, the bug is reported if CONFIG_DEBUG_ATOMIC_SLEEP build option is enabled. Fixes: a0d2f20650e8 ("Renesas Ethernet AVB PTP clock driver") Signed-off-by: Vladimir Zapolskiy --- drivers/net/ethernet/renesas/ravb_main.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 68f122140966..e7d6d1b6e7d6 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1152,15 +1152,10 @@ static int ravb_set_link_ksettings(struct net_device *ndev, static int ravb_nway_reset(struct net_device *ndev) { - struct ravb_private *priv = netdev_priv(ndev); int error = -ENODEV; - unsigned long flags; - if (ndev->phydev) { - spin_lock_irqsave(&priv->lock, flags); + if (ndev->phydev) error = phy_start_aneg(ndev->phydev); - spin_unlock_irqrestore(&priv->lock, flags); - } return error; } -- 2.17.1