From patchwork Sun May 31 09:35:24 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Malcolm Priestley X-Patchwork-Id: 6515531 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: X-Original-To: patchwork-linux-wireless@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D12EDC0020 for ; Sun, 31 May 2015 09:36:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D7C4F20626 for ; Sun, 31 May 2015 09:36:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D9C1220489 for ; Sun, 31 May 2015 09:36:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758171AbbEaJgJ (ORCPT ); Sun, 31 May 2015 05:36:09 -0400 Received: from mail-wg0-f47.google.com ([74.125.82.47]:34302 "EHLO mail-wg0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758090AbbEaJgE (ORCPT ); Sun, 31 May 2015 05:36:04 -0400 Received: by wgv5 with SMTP id 5so92564733wgv.1 for ; Sun, 31 May 2015 02:36:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=RtwmGzuKEzJcE9VMRrPGGKTB2tIIVH/eT3G3J5dSvOk=; b=npo0N+ikHN+tyvHO7GcvIP1ygg6ygUG2NLrC/E1y38P0FPnMjtQIaWogmzdlYHAN7S f3NSLZaBI7vCABGW93rgEBKPyCmeMhaHDtuSlccHToOvScrPc2hNwJcKLpXSlTMq2wDw J7XQI8vorFP1KyTD599EzXrUwQoZJyW13Goe3tr+aGhAlvgqZlc/avsaM81g2B8afWYh n/7RzIHQzPu912c6LsBwhfnOrMBY/1oOSk8UfzGsZqWg69rSGDIVfJ0bQDxO3v5mABrR W0DRWy83xH3nNCD6+5zXzpuXL9kBKg4BqM9RWC6onsZbxM6NZY6DDCMTGDlWcoFK3RpA iiww== X-Received: by 10.180.77.195 with SMTP id u3mr11014804wiw.30.1433064963112; Sun, 31 May 2015 02:36:03 -0700 (PDT) Received: from tipsey.3.home (188.31.131.59.threembb.co.uk. [188.31.131.59]) by mx.google.com with ESMTPSA id t17sm11193426wij.1.2015.05.31.02.36.00 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 31 May 2015 02:36:02 -0700 (PDT) From: Malcolm Priestley To: gregkh@linuxfoundation.org Cc: linux-wireless@vger.kernel.org, Malcolm Priestley Subject: [PATCH 5/9] staging: vt6655: use workqueue for interrupt handling Date: Sun, 31 May 2015 10:35:24 +0100 Message-Id: <1433064928-2139-5-git-send-email-tvboxspy@gmail.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1433064928-2139-1-git-send-email-tvboxspy@gmail.com> References: <1433064928-2139-1-git-send-email-tvboxspy@gmail.com> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduce vnt_interrupt to handle interrupt and use workqueue to queue and queue on vif. Convert device_intr to void call vnt_interrupt_process from vnt_interrupt_work providing vif is valid. This removes troublesome heavy code from the interupt handler and allows to remove atomic from other areas of driver. Signed-off-by: Malcolm Priestley --- drivers/staging/vt6655/device.h | 2 ++ drivers/staging/vt6655/device_main.c | 36 ++++++++++++++++++++++++++---------- 2 files changed, 28 insertions(+), 10 deletions(-) diff --git a/drivers/staging/vt6655/device.h b/drivers/staging/vt6655/device.h index e9c4bf3..b928c2a 100644 --- a/drivers/staging/vt6655/device.h +++ b/drivers/staging/vt6655/device.h @@ -405,6 +405,8 @@ struct vnt_private { unsigned short wBeaconInterval; + struct work_struct interrupt_work; + struct ieee80211_low_level_stats low_stats; }; diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c index 31f4ec7..d5f090f 100644 --- a/drivers/staging/vt6655/device_main.c +++ b/drivers/staging/vt6655/device_main.c @@ -32,7 +32,6 @@ * device_free_info - device structure resource free function * device_get_pci_info - get allocated pci io/mem resource * device_print_info - print out resource - * device_intr - interrupt handle function * device_rx_srv - rx service function * device_alloc_rx_buf - rx buffer pre-allocated function * device_free_tx_buf - free tx buffer function @@ -148,7 +147,6 @@ static void vt6655_init_info(struct pci_dev *pcid, static void device_free_info(struct vnt_private *pDevice); static bool device_get_pci_info(struct vnt_private *, struct pci_dev *pcid); static void device_print_info(struct vnt_private *pDevice); -static irqreturn_t device_intr(int irq, void *dev_instance); #ifdef CONFIG_PM static int device_notify_reboot(struct notifier_block *, unsigned long event, void *ptr); @@ -1053,27 +1051,24 @@ static void vnt_check_bb_vga(struct vnt_private *priv) } } -static irqreturn_t device_intr(int irq, void *dev_instance) +static void vnt_interrupt_process(struct vnt_private *pDevice) { - struct vnt_private *pDevice = dev_instance; struct ieee80211_low_level_stats *low_stats = &pDevice->low_stats; int max_count = 0; u32 mib_counter; unsigned char byOrgPageSel = 0; - int handled = 0; unsigned long flags; MACvReadISR(pDevice->PortOffset, &pDevice->dwIsr); if (pDevice->dwIsr == 0) - return IRQ_RETVAL(handled); + return; if (pDevice->dwIsr == 0xffffffff) { pr_debug("dwIsr = 0xffff\n"); - return IRQ_RETVAL(handled); + return; } - handled = 1; MACvIntDisable(pDevice->PortOffset); spin_lock_irqsave(&pDevice->lock, flags); @@ -1175,8 +1170,25 @@ static irqreturn_t device_intr(int irq, void *dev_instance) spin_unlock_irqrestore(&pDevice->lock, flags); MACvIntEnable(pDevice->PortOffset, IMR_MASK_VALUE); +} + +static void vnt_interrupt_work(struct work_struct *work) +{ + struct vnt_private *priv = + container_of(work, struct vnt_private, interrupt_work); + + if (priv->vif) + vnt_interrupt_process(priv); +} + +static irqreturn_t vnt_interrupt(int irq, void *arg) +{ + struct vnt_private *priv = arg; - return IRQ_RETVAL(handled); + if (priv->vif) + schedule_work(&priv->interrupt_work); + + return IRQ_HANDLED; } static int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb) @@ -1268,7 +1280,7 @@ static int vnt_start(struct ieee80211_hw *hw) if (!device_init_rings(priv)) return -ENOMEM; - ret = request_irq(priv->pcid->irq, &device_intr, + ret = request_irq(priv->pcid->irq, &vnt_interrupt, IRQF_SHARED, "vt6655", priv); if (ret) { dev_dbg(&priv->pcid->dev, "failed to start irq\n"); @@ -1297,6 +1309,8 @@ static void vnt_stop(struct ieee80211_hw *hw) ieee80211_stop_queues(hw); + cancel_work_sync(&priv->interrupt_work); + MACbShutdown(priv->PortOffset); MACbSoftwareReset(priv->PortOffset); CARDbRadioPowerOff(priv); @@ -1783,6 +1797,8 @@ vt6655_probe(struct pci_dev *pcid, const struct pci_device_id *ent) return -ENODEV; } + INIT_WORK(&priv->interrupt_work, vnt_interrupt_work); + /* do reset */ if (!MACbSoftwareReset(priv->PortOffset)) { dev_err(&pcid->dev, ": Failed to access MAC hardware..\n");