From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-2601871-1521718778-2-10167899309743255037 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='de', MailFrom='org' X-Spam-charsets: from='ISO-8859-1', plain='iso-8859-1' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-usb-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1521718777; b=suhv6DBiLAqfL6N9b02vEaF77FdTbUNZbbe7j3HehGFedTv FkshtI3NJ8e6yvWXFJ4/hgQiNF0bjXI2RIMORCzvkFCV4XvbzLubWHTdyPJrIUGz ie6PGsGahRQ9iJqGjp4ObDjxfnylfu2VzN8x3a0lZCcZiSD2B5QS85GyxmkcGV6t JvVsnC/DGh7L1DP24b4knujBSciOa9lF+Wu6TBFJr75uPJsrOXlTXYnn96X4mL5r 2gq1Qv24MQlf6pJzQ/CRPbdeJGNXAJuZcK3zX6mrSnIUU6U13yTLIGj3wo5ojnSa XZcCCd6lHidHcfhXN6/CQ/Y5XDEgO3SfP7GJoOg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding :content-type:sender:list-id; s=arctest; t=1521718777; bh=JCBij7 DNm0uIcOsplDKGQOw3zE1O0t062Ef7Acgi+aw=; b=oTuxzqrg5G5U7il31apsNC RCCBup8nI+jU8X1gcRWTz19nQXGk2g8ftqq4+EkzAuZezF1Fpsp3Pd7i5Q/9hKBo Hw94Xv17RWshOQzduBoXkvwRLPxqfEbcy0z9GYDKtSJVINtN6PdUfzakLsT4kdw+ ekOiJlO0AF4EKbtqQYgAwSDeH7T58HgW4D1PGx6HkJIegt08rdKpvDGXyR+WXbLi Em57PFRzauqfb2PNsewBZBUUQkMI+VRunZ+dcqrie6OP4gIfSqN8C17YJbXC9um6 RMX3fEUK4/gxm40IykxHmy3jupBOVb0EQ1JzL6a0AaStKNnTWGJgqoVe2SFDJycQ == ARC-Authentication-Results: i=1; mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=sntech.de; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-usb-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=sntech.de header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=sntech.de; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-usb-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=sntech.de header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752180AbeCVLjY convert rfc822-to-8bit (ORCPT ); Thu, 22 Mar 2018 07:39:24 -0400 Received: from gloria.sntech.de ([95.129.55.99]:55428 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751875AbeCVLjX (ORCPT ); Thu, 22 Mar 2018 07:39:23 -0400 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: Tomeu Vizoso Cc: linux-kernel@vger.kernel.org, Felipe Balbi , Amelie Delaunay , Minas Harutyunyan , Greg Kroah-Hartman , linux-usb@vger.kernel.org Subject: Re: [PATCH] usb: dwc2: dwc2_vbus_supply_init: fix error check Date: Thu, 22 Mar 2018 12:39:13 +0100 Message-ID: <1711886.RiDBCvOSMq@diego> In-Reply-To: <20180322093943.49717-1-tomeu.vizoso@collabora.com> References: <20180322093943.49717-1-tomeu.vizoso@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="iso-8859-1" Sender: linux-usb-owner@vger.kernel.org X-Mailing-List: linux-usb@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Am Donnerstag, 22. März 2018, 10:39:43 CET schrieb Tomeu Vizoso: > devm_regulator_get_optional returns -ENODEV if the regulator isn't > there, so if that's the case we have to make sure not to leave -ENODEV > in the regulator pointer. > > Also, make sure we return 0 in that case, but correctly propagate any > other errors. Also propagate the error from _dwc2_hcd_start. > > Fixes: 531ef5ebea96 ("usb: dwc2: add support for host mode external vbus > supply") Cc: Amelie Delaunay > Signed-off-by: Tomeu Vizoso Thanks for catching that oops in your tests. Reviewed-by: Heiko Stuebner > --- > drivers/usb/dwc2/hcd.c | 13 ++++++++----- > 1 file changed, 8 insertions(+), 5 deletions(-) > > diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c > index dcfda5eb4cac..4ae211f65e85 100644 > --- a/drivers/usb/dwc2/hcd.c > +++ b/drivers/usb/dwc2/hcd.c > @@ -359,8 +359,13 @@ static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg) > static int dwc2_vbus_supply_init(struct dwc2_hsotg *hsotg) > { > hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus"); > - if (IS_ERR(hsotg->vbus_supply)) > - return 0; > + if (IS_ERR(hsotg->vbus_supply)) { > + hsotg->vbus_supply = NULL; > + if (PTR_ERR(hsotg->vbus_supply) == -ENODEV) > + return 0; > + else > + return PTR_ERR(hsotg->vbus_supply); > + } > > return regulator_enable(hsotg->vbus_supply); > } > @@ -4342,9 +4347,7 @@ static int _dwc2_hcd_start(struct usb_hcd *hcd) > > spin_unlock_irqrestore(&hsotg->lock, flags); > > - dwc2_vbus_supply_init(hsotg); > - > - return 0; > + return dwc2_vbus_supply_init(hsotg); > } > > /*