From patchwork Fri May 4 15:17:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Andrzej Siewior X-Patchwork-Id: 908815 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linutronix.de Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40cwd43xMhz9s0q for ; Sat, 5 May 2018 01:18:16 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751502AbeEDPSK (ORCPT ); Fri, 4 May 2018 11:18:10 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:41157 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751470AbeEDPSH (ORCPT ); Fri, 4 May 2018 11:18:07 -0400 Received: from localhost ([127.0.0.1] helo=bazinga.breakpoint.cc) by Galois.linutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1fEcTE-0006NR-Sr; Fri, 04 May 2018 17:18:05 +0200 From: Sebastian Andrzej Siewior To: netdev@vger.kernel.org Cc: "David S. Miller" , tglx@linutronix.de, Anna-Maria Gleixner , Steffen Klassert , Sebastian Andrzej Siewior Subject: [PATCH 3/4] net: 3com: 3c59x: Pull locking out of ISR Date: Fri, 4 May 2018 17:17:48 +0200 Message-Id: <20180504151749.6966-4-bigeasy@linutronix.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180504151749.6966-1-bigeasy@linutronix.de> References: <20180504151749.6966-1-bigeasy@linutronix.de> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Anna-Maria Gleixner Locking is done in the same way in _vortex_interrupt() and _boomerang_interrupt(). To prevent duplication, move the locking into the calling vortex_boomerang_interrupt() function. No functional change. Cc: Steffen Klassert Signed-off-by: Anna-Maria Gleixner Signed-off-by: Sebastian Andrzej Siewior --- drivers/net/ethernet/3com/3c59x.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c index 0cfdb07f3e59..fdafe25da153 100644 --- a/drivers/net/ethernet/3com/3c59x.c +++ b/drivers/net/ethernet/3com/3c59x.c @@ -2273,7 +2273,6 @@ _vortex_interrupt(int irq, struct net_device *dev) unsigned int bytes_compl = 0, pkts_compl = 0; ioaddr = vp->ioaddr; - spin_lock(&vp->lock); status = ioread16(ioaddr + EL3_STATUS); @@ -2371,7 +2370,6 @@ _vortex_interrupt(int irq, struct net_device *dev) pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name, status); handler_exit: - spin_unlock(&vp->lock); return IRQ_RETVAL(handled); } @@ -2392,12 +2390,6 @@ _boomerang_interrupt(int irq, struct net_device *dev) ioaddr = vp->ioaddr; - - /* - * It seems dopey to put the spinlock this early, but we could race against vortex_tx_timeout - * and boomerang_start_xmit - */ - spin_lock(&vp->lock); vp->handling_irq = 1; status = ioread16(ioaddr + EL3_STATUS); @@ -2516,7 +2508,6 @@ _boomerang_interrupt(int irq, struct net_device *dev) dev->name, status); handler_exit: vp->handling_irq = 0; - spin_unlock(&vp->lock); return IRQ_RETVAL(handled); } @@ -2525,11 +2516,18 @@ vortex_boomerang_interrupt(int irq, void *dev_id) { struct net_device *dev = dev_id; struct vortex_private *vp = netdev_priv(dev); + irqreturn_t ret; + + spin_lock(&vp->lock); if (vp->full_bus_master_rx) - return _boomerang_interrupt(dev->irq, dev); + ret = _boomerang_interrupt(dev->irq, dev); else - return _vortex_interrupt(dev->irq, dev); + ret = _vortex_interrupt(dev->irq, dev); + + spin_unlock(&vp->lock); + + return ret; } static int vortex_rx(struct net_device *dev)