From patchwork Sun Sep 27 19:48:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 289531 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A19E7C4346E for ; Sun, 27 Sep 2020 19:57:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A1B323A33 for ; Sun, 27 Sep 2020 19:57:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="18wUYjsd"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Uk0vLGNo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726876AbgI0T5a (ORCPT ); Sun, 27 Sep 2020 15:57:30 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:41032 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726885AbgI0T5T (ORCPT ); Sun, 27 Sep 2020 15:57:19 -0400 Message-Id: <20200927194920.730139599@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1601236636; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=EEFvcB/PwX9I89XLy131RQtWz3cYksfF3sbWg1NgDKQ=; b=18wUYjsdKMHJjgk4Us6khomilIdN25/SxDKIyuwyy0mSiSW/AeUP1NyRsE5FG33qrGO7QW jAw9J0tpj7pkffmpsb/I2xP+dFW27rpV0wEiciSCAhxQ4lnNpojA/FRCq5TQQMHJs+lphz fgNiUXBSNsmvPrgof215OGNS4MuZnGdrVxgP/w3I5rVQS+sGNlkRrVZGKmKgjWg+gIT3ZC R3cytjZp8ns5FunZ7qOWr6CiFfel+oq9NIgBWersYnxzOkskjX86LkiuElpQ5nTvA14pAx TSOmfZ9AKUnaegaoe9jBxklb5wqP3NKRYyZYH2Da+kRNpZ7XfqbG/dYW5gWETg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1601236636; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=EEFvcB/PwX9I89XLy131RQtWz3cYksfF3sbWg1NgDKQ=; b=Uk0vLGNob7iKmswDXccCQehW+RKFAsRxN//Pf6BDgW08Dcoqm6jDgpCxycTWKPE0t0GELZ tesv+y7MgSj9WRBg== Date: Sun, 27 Sep 2020 21:48:55 +0200 From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Linus Torvalds , Paul McKenney , Matthew Wilcox , Sebastian Andrzej Siewior , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, Christian Benvenuti , Govindarajulu Varadarajan <_govind@gmx.com>, Dave Miller , Jonathan Corbet , Mauro Carvalho Chehab , linux-doc@vger.kernel.org, Luc Van Oostenryck , Jay Cliburn , Chris Snook , Vishal Kulkarni , Jeff Kirsher , intel-wired-lan@lists.osuosl.org, Shannon Nelson , Pensando Drivers , Andrew Lunn , Heiner Kallweit , Russell King , Thomas Bogendoerfer , Solarflare linux maintainers , Edward Cree , Martin Habets , Jon Mason , Daniel Drake , Ulrich Kunitz , Kalle Valo , linux-wireless@vger.kernel.org, linux-usb@vger.kernel.org, Greg Kroah-Hartman , Arend van Spriel , Franky Lin , Hante Meuleman , Chi-Hsien Lin , Wright Feng , brcm80211-dev-list.pdl@broadcom.com, brcm80211-dev-list@cypress.com, Stanislav Yakovlev , Stanislaw Gruszka , Johannes Berg , Emmanuel Grumbach , Luca Coelho , Intel Linux Wireless , Jouni Malinen , Amitkumar Karwar , Ganapathi Bhat , Xinming Hu , libertas-dev@lists.infradead.org, Pascal Terjan , Ping-Ke Shih Subject: [patch 09/35] net: fec_mpc52xx: Replace in_interrupt() usage References: <20200927194846.045411263@linutronix.de> MIME-Version: 1.0 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Sebastian Andrzej Siewior The usage of in_interrupt() in drivers is phased out and Linus clearly requested that code which changes behaviour depending on context should either be seperated or the context be conveyed in an argument passed by the caller, which usually knows the context. mpc52xx_fec_stop() uses in_interrupt() to check if it is safe to sleep. All callers run in well defined contexts. Pass an argument from the callers indicating whether it is safe to sleep. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Thomas Gleixner Cc: "David S. Miller" Cc: Jakub Kicinski Cc: netdev@vger.kernel.org --- drivers/net/ethernet/freescale/fec_mpc52xx.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) --- a/drivers/net/ethernet/freescale/fec_mpc52xx.c +++ b/drivers/net/ethernet/freescale/fec_mpc52xx.c @@ -74,7 +74,7 @@ struct mpc52xx_fec_priv { static irqreturn_t mpc52xx_fec_interrupt(int, void *); static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *); static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *); -static void mpc52xx_fec_stop(struct net_device *dev); +static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep); static void mpc52xx_fec_start(struct net_device *dev); static void mpc52xx_fec_reset(struct net_device *dev); @@ -283,7 +283,7 @@ static int mpc52xx_fec_close(struct net_ netif_stop_queue(dev); - mpc52xx_fec_stop(dev); + mpc52xx_fec_stop(dev, true); mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk); @@ -693,7 +693,7 @@ static void mpc52xx_fec_start(struct net * * stop all activity on fec and empty dma buffers */ -static void mpc52xx_fec_stop(struct net_device *dev) +static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep) { struct mpc52xx_fec_priv *priv = netdev_priv(dev); struct mpc52xx_fec __iomem *fec = priv->fec; @@ -706,7 +706,7 @@ static void mpc52xx_fec_stop(struct net_ bcom_disable(priv->rx_dmatsk); /* Wait for tx queue to drain, but only if we're in process context */ - if (!in_interrupt()) { + if (may_sleep) { timeout = jiffies + msecs_to_jiffies(2000); while (time_before(jiffies, timeout) && !bcom_queue_empty(priv->tx_dmatsk)) @@ -738,7 +738,7 @@ static void mpc52xx_fec_reset(struct net struct mpc52xx_fec_priv *priv = netdev_priv(dev); struct mpc52xx_fec __iomem *fec = priv->fec; - mpc52xx_fec_stop(dev); + mpc52xx_fec_stop(dev, false); out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status)); out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);