From patchwork Tue Sep 29 20:25:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 297421 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=-6.9 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 BF7B5C54F51 for ; Tue, 29 Sep 2020 20:39:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62AF220774 for ; Tue, 29 Sep 2020 20:39:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="jVCtw2lj"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="cz/fvbwE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730134AbgI2Ujp (ORCPT ); Tue, 29 Sep 2020 16:39:45 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:48614 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729388AbgI2Uf6 (ORCPT ); Tue, 29 Sep 2020 16:35:58 -0400 Message-Id: <20200929203500.870136509@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1601411756; 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=z3moHQN6gl51QG697Ig4fcwx454n2NJK4rp8mf5cNuM=; b=jVCtw2ljxAFvqhAGfu6tMOO+k6YrsNVclMOkPke8dvG+YpIVNxH2QBcy0bO04sbuPXYwUw xZrde8ZuN+JyPv2TTYVvIiktfDoyR2T7ZurcH+IieZjs0HigDqt30ptzHdpdtWBukvdhDI 15A+imKV1yQ80015acETWy241+VdPwNHT7wGtVOmknIM1heY5YZlS5kDdHn3V1/YxpTj9z uA+iH1qXViLCb14RpMVnHLY16VbqN045hZ4D1VKoO5b1XKcZ0H0EgJazSX7k51qG2fZYSu KvB/j2+KnuKsoN3n7nceS1o28YzQCbFp4VUvjyRG6BujSIVZZFBAtyeBKTL+9w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1601411756; 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=z3moHQN6gl51QG697Ig4fcwx454n2NJK4rp8mf5cNuM=; b=cz/fvbwEmtU2I7VB5GFxobVdz4+igLoEhz0hFG5h/u9T4PsPi5iWQ70/vcLbBgcyROmgwp Hr2Z0yFyRFjlJqAg== Date: Tue, 29 Sep 2020 22:25:23 +0200 From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Paul McKenney , Matthew Wilcox , Christian Benvenuti , Govindarajulu Varadarajan <_govind@gmx.com>, Dave Miller , Jakub Kicinski , netdev@vger.kernel.org, Jonathan Corbet , Mauro Carvalho Chehab , linux-doc@vger.kernel.org, Sebastian Andrzej Siewior , 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 V2 14/36] net: natsemi: Replace in_interrupt() usage. References: <20200929202509.673358734@linutronix.de> MIME-Version: 1.0 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Thomas Gleixner 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. sonic_quiesce() uses 'in_interrupt() || irqs_disabled()' to chose either udelay() or usleep_range() in the wait loop. In all callchains leading to it the context is well defined and known. Add a 'may_sleep' argument and pass it through the various callchains leading to this function. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Thomas Gleixner --- drivers/net/ethernet/natsemi/sonic.c | 24 ++++++++++++------------ drivers/net/ethernet/natsemi/sonic.h | 2 +- 2 files changed, 13 insertions(+), 13 deletions(-) --- a/drivers/net/ethernet/natsemi/sonic.c +++ b/drivers/net/ethernet/natsemi/sonic.c @@ -143,7 +143,7 @@ static int sonic_open(struct net_device /* * Initialize the SONIC */ - sonic_init(dev); + sonic_init(dev, true); netif_start_queue(dev); @@ -153,7 +153,7 @@ static int sonic_open(struct net_device } /* Wait for the SONIC to become idle. */ -static void sonic_quiesce(struct net_device *dev, u16 mask) +static void sonic_quiesce(struct net_device *dev, u16 mask, bool may_sleep) { struct sonic_local * __maybe_unused lp = netdev_priv(dev); int i; @@ -163,7 +163,7 @@ static void sonic_quiesce(struct net_dev bits = SONIC_READ(SONIC_CMD) & mask; if (!bits) return; - if (irqs_disabled() || in_interrupt()) + if (!may_sleep) udelay(20); else usleep_range(100, 200); @@ -187,7 +187,7 @@ static int sonic_close(struct net_device * stop the SONIC, disable interrupts */ SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS); - sonic_quiesce(dev, SONIC_CR_ALL); + sonic_quiesce(dev, SONIC_CR_ALL, true); SONIC_WRITE(SONIC_IMR, 0); SONIC_WRITE(SONIC_ISR, 0x7fff); @@ -229,7 +229,7 @@ static void sonic_tx_timeout(struct net_ * disable all interrupts before releasing DMA buffers */ SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS); - sonic_quiesce(dev, SONIC_CR_ALL); + sonic_quiesce(dev, SONIC_CR_ALL, false); SONIC_WRITE(SONIC_IMR, 0); SONIC_WRITE(SONIC_ISR, 0x7fff); @@ -246,7 +246,7 @@ static void sonic_tx_timeout(struct net_ } } /* Try to restart the adaptor. */ - sonic_init(dev); + sonic_init(dev, false); lp->stats.tx_errors++; netif_trans_update(dev); /* prevent tx timeout */ netif_wake_queue(dev); @@ -692,9 +692,9 @@ static void sonic_multicast_list(struct /* LCAM and TXP commands can't be used simultaneously */ spin_lock_irqsave(&lp->lock, flags); - sonic_quiesce(dev, SONIC_CR_TXP); + sonic_quiesce(dev, SONIC_CR_TXP, false); SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM); - sonic_quiesce(dev, SONIC_CR_LCAM); + sonic_quiesce(dev, SONIC_CR_LCAM, false); spin_unlock_irqrestore(&lp->lock, flags); } } @@ -708,7 +708,7 @@ static void sonic_multicast_list(struct /* * Initialize the SONIC ethernet controller. */ -static int sonic_init(struct net_device *dev) +static int sonic_init(struct net_device *dev, bool may_sleep) { struct sonic_local *lp = netdev_priv(dev); int i; @@ -730,7 +730,7 @@ static int sonic_init(struct net_device */ SONIC_WRITE(SONIC_CMD, 0); SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS | SONIC_CR_STP); - sonic_quiesce(dev, SONIC_CR_ALL); + sonic_quiesce(dev, SONIC_CR_ALL, may_sleep); /* * initialize the receive resource area @@ -759,7 +759,7 @@ static int sonic_init(struct net_device netif_dbg(lp, ifup, dev, "%s: issuing RRRA command\n", __func__); SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA); - sonic_quiesce(dev, SONIC_CR_RRRA); + sonic_quiesce(dev, SONIC_CR_RRRA, may_sleep); /* * Initialize the receive descriptors so that they @@ -834,7 +834,7 @@ static int sonic_init(struct net_device * load the CAM */ SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM); - sonic_quiesce(dev, SONIC_CR_LCAM); + sonic_quiesce(dev, SONIC_CR_LCAM, may_sleep); /* * enable receiver, disable loopback --- a/drivers/net/ethernet/natsemi/sonic.h +++ b/drivers/net/ethernet/natsemi/sonic.h @@ -338,7 +338,7 @@ static void sonic_rx(struct net_device * static int sonic_close(struct net_device *dev); static struct net_device_stats *sonic_get_stats(struct net_device *dev); static void sonic_multicast_list(struct net_device *dev); -static int sonic_init(struct net_device *dev); +static int sonic_init(struct net_device *dev, bool may_sleep); static void sonic_tx_timeout(struct net_device *dev, unsigned int txqueue); static void sonic_msg_init(struct net_device *dev); static int sonic_alloc_descriptors(struct net_device *dev);