From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 5BC92C433E1 for ; Fri, 24 Jul 2020 23:39:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30F1E206E3 for ; Fri, 24 Jul 2020 23:39:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="D7nV1Q5U" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726857AbgGXXjn (ORCPT ); Fri, 24 Jul 2020 19:39:43 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:41918 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726592AbgGXXjn (ORCPT ); Fri, 24 Jul 2020 19:39:43 -0400 Received: from mailhost.synopsys.com (sv2-mailhost1.synopsys.com [10.205.2.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 176D5C0089; Fri, 24 Jul 2020 23:39:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1595633983; bh=xAwVcmzm9Oe0n34N3OLwdBdnmXoHuL4WZkDfW7N5bU0=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=D7nV1Q5UpgPOLe8PpPJup2uhNSVAWDw3QS+gTbDRvJZ1dI4HytbsfH6/1MN1uFJcq I/1QNDYyFjugno7xNiIjVdwljnu4bpQ7B7HzqSwRVJMrFKnVlzN9t9EGlvv6SrrmK+ NbtP5jReuSNK/Nhm7KxpmCYzjvjW7yo/U2Fj0lZ9cZMnFQEhHhVX/CRyyzblXxfPpx 4cZbZGh5nz4WZeJ+EvEpEtiZrTmNng9oxl0xE+CYlyIQSUFM9sluzjTs6rYF3Mcple 8dl87ZjCR3cVsEiJY2KAyiYUr9DJNVpkbOVHkMW1OEyqkrIRIRXMLiCEb9gIsi78Bd qWIm5XOjvjgjg== Received: from te-lab16 (nanobot.internal.synopsys.com [10.10.186.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailhost.synopsys.com (Postfix) with ESMTPSA id DBE76A0096; Fri, 24 Jul 2020 23:39:41 +0000 (UTC) Received: by te-lab16 (sSMTP sendmail emulation); Fri, 24 Jul 2020 16:39:41 -0700 Date: Fri, 24 Jul 2020 16:39:41 -0700 Message-Id: In-Reply-To: References: X-SNPS-Relay: synopsys.com From: Thinh Nguyen Subject: [PATCH v3 12/12] usb: dwc3: gadget: Set speed only up to the max supported To: Felipe Balbi , Greg Kroah-Hartman , Thinh Nguyen , linux-usb@vger.kernel.org Cc: John Youn Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The setting of device speed should be limited by the device's maximum_speed. This patch adds a check and prevent the driver from attempting to configure higher than the maximum_speed. Signed-off-by: Thinh Nguyen --- Changes in v3: - None Changes in v2: - None drivers/usb/dwc3/gadget.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 05defaf0f745..f62a9519287a 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2276,6 +2276,7 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed) { struct dwc3 *dwc = gadget_to_dwc(g); + enum usb_device_speed selected_speed = speed; unsigned long flags; u32 reg; @@ -2300,7 +2301,10 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, !dwc->dis_metastability_quirk) { reg |= DWC3_DCFG_SUPERSPEED; } else { - switch (speed) { + if (speed > dwc->maximum_speed) + selected_speed = dwc->maximum_speed; + + switch (selected_speed) { case USB_SPEED_LOW: reg |= DWC3_DCFG_LOWSPEED; break; @@ -2320,7 +2324,8 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, reg |= DWC3_DCFG_SUPERSPEED_PLUS; break; default: - dev_err(dwc->dev, "invalid speed (%d)\n", speed); + dev_err(dwc->dev, "invalid speed (%d)\n", + selected_speed); if (DWC3_IP_IS(DWC3)) reg |= DWC3_DCFG_SUPERSPEED; @@ -2329,7 +2334,7 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, } } - if (DWC3_IP_IS(DWC32) && speed < USB_SPEED_SUPER_PLUS) + if (DWC3_IP_IS(DWC32) && selected_speed < USB_SPEED_SUPER_PLUS) reg &= ~DWC3_DCFG_NUMLANES(~0); dwc3_writel(dwc->regs, DWC3_DCFG, reg); -- 2.11.0