From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752663AbdAZBjF (ORCPT ); Wed, 25 Jan 2017 20:39:05 -0500 Received: from rtits2.realtek.com ([211.75.126.72]:35522 "EHLO rtits2.realtek.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752218AbdAZBjD (ORCPT ); Wed, 25 Jan 2017 20:39:03 -0500 Authenticated-By: X-SpamFilter-By: BOX Solutions SpamTrap 5.56 with qID v0Q1crV0000877, This message is accepted by code: ctloc85258 From: Hayes Wang To: CC: , , , Hayes Wang Subject: [PATCH net v3 2/4] r8152: avoid start_xmit to schedule napi when napi is disabled Date: Thu, 26 Jan 2017 09:38:32 +0800 Message-ID: <1394712342-15778-249-Taiwan-albertk@realtek.com> X-Mailer: Microsoft Office Outlook 11 In-Reply-To: <1394712342-15778-247-Taiwan-albertk@realtek.com> References: <1394712342-15778-236-Taiwan-albertk@realtek.com> <1394712342-15778-247-Taiwan-albertk@realtek.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [172.21.177.172] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Stop the tx when the napi is disabled to prevent napi_schedule() is called. Signed-off-by: Hayes Wang --- drivers/net/usb/r8152.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 23bef8e..ec882be 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -3155,10 +3155,13 @@ static void set_carrier(struct r8152 *tp) if (!netif_carrier_ok(netdev)) { tp->rtl_ops.enable(tp); set_bit(RTL8152_SET_RX_MODE, &tp->flags); + netif_stop_queue(netdev); napi_disable(&tp->napi); netif_carrier_on(netdev); rtl_start_rx(tp); napi_enable(&tp->napi); + netif_wake_queue(netdev); + netif_info(tp, link, netdev, "carrier on\n"); } } else { if (netif_carrier_ok(netdev)) { @@ -3166,6 +3169,7 @@ static void set_carrier(struct r8152 *tp) napi_disable(&tp->napi); tp->rtl_ops.disable(tp); napi_enable(&tp->napi); + netif_info(tp, link, netdev, "carrier off\n"); } } } @@ -3515,12 +3519,12 @@ static int rtl8152_pre_reset(struct usb_interface *intf) if (!netif_running(netdev)) return 0; + netif_stop_queue(netdev); napi_disable(&tp->napi); clear_bit(WORK_ENABLE, &tp->flags); usb_kill_urb(tp->intr_urb); cancel_delayed_work_sync(&tp->schedule); if (netif_carrier_ok(netdev)) { - netif_stop_queue(netdev); mutex_lock(&tp->control); tp->rtl_ops.disable(tp); mutex_unlock(&tp->control); @@ -3548,10 +3552,10 @@ static int rtl8152_post_reset(struct usb_interface *intf) rtl_start_rx(tp); rtl8152_set_rx_mode(netdev); mutex_unlock(&tp->control); - netif_wake_queue(netdev); } napi_enable(&tp->napi); + netif_wake_queue(netdev); usb_submit_urb(tp->intr_urb, GFP_KERNEL); return 0; -- 2.7.4