From patchwork Tue Aug 10 17:30:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 494939 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=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 00812C4338F for ; Tue, 10 Aug 2021 18:00:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DBAD060249 for ; Tue, 10 Aug 2021 18:00:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237549AbhHJSBO (ORCPT ); Tue, 10 Aug 2021 14:01:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:33870 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238055AbhHJR7R (ORCPT ); Tue, 10 Aug 2021 13:59:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1F0C161008; Tue, 10 Aug 2021 17:46:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628617571; bh=+3nyMcTYOJvcH4M86NuUUBtlNN4eQRGIu1ekamPlERo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xq3oZFzN/3Tkp+PpZH+RoIQ5ez7zpUBart9u3Q9UpciJk+/DZAvQsUyDySkLPcAOw BD5KJLe5R7XRml9VO8z9Z7XbbC9xo+k8PdUsjaIvPbYQU3Blck2hK9F7Q82jFE3v8j EIeugjIvHP511226Qr4rCjdOnMXQmiRPHP0SP/ic= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pavel Skripkin Subject: [PATCH 5.13 117/175] staging: rtl8712: get rid of flush_scheduled_work Date: Tue, 10 Aug 2021 19:30:25 +0200 Message-Id: <20210810173004.804378253@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210810173000.928681411@linuxfoundation.org> References: <20210810173000.928681411@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Pavel Skripkin commit 9be550ee43919b070bcd77f9228bdbbbc073245b upstream. This patch is preparation for following patch for error handling refactoring. flush_scheduled_work() takes (wq_completion)events lock and it can lead to deadlock when r871xu_dev_remove() is called from workqueue. To avoid deadlock sutiation we can change flush_scheduled_work() call to flush_work() call for all possibly scheduled works in this driver, since next patch adds device_release_driver() in case of fw load failure. Signed-off-by: Pavel Skripkin Cc: stable Link: https://lore.kernel.org/r/6e028b4c457eeb7156c76c6ea3cdb3cb0207c7e1.1626895918.git.paskripkin@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8712/rtl8712_led.c | 8 ++++++++ drivers/staging/rtl8712/rtl871x_led.h | 1 + drivers/staging/rtl8712/rtl871x_pwrctrl.c | 8 ++++++++ drivers/staging/rtl8712/rtl871x_pwrctrl.h | 1 + drivers/staging/rtl8712/usb_intf.c | 3 ++- 5 files changed, 20 insertions(+), 1 deletion(-) --- a/drivers/staging/rtl8712/rtl8712_led.c +++ b/drivers/staging/rtl8712/rtl8712_led.c @@ -1820,3 +1820,11 @@ void LedControl871x(struct _adapter *pad break; } } + +void r8712_flush_led_works(struct _adapter *padapter) +{ + struct led_priv *pledpriv = &padapter->ledpriv; + + flush_work(&pledpriv->SwLed0.BlinkWorkItem); + flush_work(&pledpriv->SwLed1.BlinkWorkItem); +} --- a/drivers/staging/rtl8712/rtl871x_led.h +++ b/drivers/staging/rtl8712/rtl871x_led.h @@ -112,6 +112,7 @@ struct led_priv { void r8712_InitSwLeds(struct _adapter *padapter); void r8712_DeInitSwLeds(struct _adapter *padapter); void LedControl871x(struct _adapter *padapter, enum LED_CTL_MODE LedAction); +void r8712_flush_led_works(struct _adapter *padapter); #endif --- a/drivers/staging/rtl8712/rtl871x_pwrctrl.c +++ b/drivers/staging/rtl8712/rtl871x_pwrctrl.c @@ -224,3 +224,11 @@ void r8712_unregister_cmd_alive(struct _ } mutex_unlock(&pwrctrl->mutex_lock); } + +void r8712_flush_rwctrl_works(struct _adapter *padapter) +{ + struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv; + + flush_work(&pwrctrl->SetPSModeWorkItem); + flush_work(&pwrctrl->rpwm_workitem); +} --- a/drivers/staging/rtl8712/rtl871x_pwrctrl.h +++ b/drivers/staging/rtl8712/rtl871x_pwrctrl.h @@ -108,5 +108,6 @@ void r8712_cpwm_int_hdl(struct _adapter void r8712_set_ps_mode(struct _adapter *padapter, uint ps_mode, uint smart_ps); void r8712_set_rpwm(struct _adapter *padapter, u8 val8); +void r8712_flush_rwctrl_works(struct _adapter *padapter); #endif /* __RTL871X_PWRCTRL_H_ */ --- a/drivers/staging/rtl8712/usb_intf.c +++ b/drivers/staging/rtl8712/usb_intf.c @@ -609,7 +609,8 @@ static void r871xu_dev_remove(struct usb padapter->surprise_removed = true; if (pnetdev->reg_state != NETREG_UNINITIALIZED) unregister_netdev(pnetdev); /* will call netdev_close() */ - flush_scheduled_work(); + r8712_flush_rwctrl_works(padapter); + r8712_flush_led_works(padapter); udelay(1); /* Stop driver mlme relation timer */ r8712_stop_drv_timers(padapter);