From patchwork Tue Jun 2 07:12:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jun Li X-Patchwork-Id: 11583317 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3945C618 for ; Tue, 2 Jun 2020 07:27:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 26AC820772 for ; Tue, 2 Jun 2020 07:27:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726177AbgFBH1X (ORCPT ); Tue, 2 Jun 2020 03:27:23 -0400 Received: from inva021.nxp.com ([92.121.34.21]:33258 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725616AbgFBH1X (ORCPT ); Tue, 2 Jun 2020 03:27:23 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 29C1320098E; Tue, 2 Jun 2020 09:27:21 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id A9EB6200972; Tue, 2 Jun 2020 09:27:18 +0200 (CEST) Received: from titan.ap.freescale.net (titan.ap.freescale.net [10.192.208.233]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 4C82140280; Tue, 2 Jun 2020 15:27:15 +0800 (SGT) From: jun.li@nxp.com To: linux@roeck-us.net, heikki.krogerus@linux.intel.com Cc: john.stultz@linaro.org, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org Subject: [PATCH] usb: typec: tcpci_rt1711h: avoid screaming irq causing boot hangs Date: Tue, 2 Jun 2020 15:12:08 +0800 Message-Id: <20200602071208.12120-1-jun.li@nxp.com> X-Mailer: git-send-email 2.9.5 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Li Jun John reported screaming irq caused by rt1711h when system boot[1], this is because irq request is done before tcpci_register_port(), so the chip->tcpci has not been setup, irq handler is entered but can't do anything, this patch is to address this by moving the irq request after tcpci_register_port(). [1] https://lkml.org/lkml/2020/5/30/1 Cc: John Stultz Signed-off-by: Li Jun Reviewed-by: Guenter Roeck --- drivers/usb/typec/tcpm/tcpci_rt1711h.c | 31 ++++++++++--------------------- 1 file changed, 10 insertions(+), 21 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c index 0173890..b56a088 100644 --- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c +++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c @@ -179,26 +179,6 @@ static irqreturn_t rt1711h_irq(int irq, void *dev_id) return tcpci_irq(chip->tcpci); } -static int rt1711h_init_alert(struct rt1711h_chip *chip, - struct i2c_client *client) -{ - int ret; - - /* Disable chip interrupts before requesting irq */ - ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0); - if (ret < 0) - return ret; - - ret = devm_request_threaded_irq(chip->dev, client->irq, NULL, - rt1711h_irq, - IRQF_ONESHOT | IRQF_TRIGGER_LOW, - dev_name(chip->dev), chip); - if (ret < 0) - return ret; - enable_irq_wake(client->irq); - return 0; -} - static int rt1711h_sw_reset(struct rt1711h_chip *chip) { int ret; @@ -260,7 +240,8 @@ static int rt1711h_probe(struct i2c_client *client, if (ret < 0) return ret; - ret = rt1711h_init_alert(chip, client); + /* Disable chip interrupts before requesting irq */ + ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0); if (ret < 0) return ret; @@ -271,6 +252,14 @@ static int rt1711h_probe(struct i2c_client *client, if (IS_ERR_OR_NULL(chip->tcpci)) return PTR_ERR(chip->tcpci); + ret = devm_request_threaded_irq(chip->dev, client->irq, NULL, + rt1711h_irq, + IRQF_ONESHOT | IRQF_TRIGGER_LOW, + dev_name(chip->dev), chip); + if (ret < 0) + return ret; + enable_irq_wake(client->irq); + return 0; }