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=-7.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 0E5ACC43441 for ; Fri, 9 Nov 2018 08:43:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BA7AD20883 for ; Fri, 9 Nov 2018 08:43:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="kyOZHZ8s" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA7AD20883 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=synopsys.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727825AbeKISXC (ORCPT ); Fri, 9 Nov 2018 13:23:02 -0500 Received: from smtprelay.synopsys.com ([198.182.60.111]:33536 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727676AbeKISXC (ORCPT ); Fri, 9 Nov 2018 13:23:02 -0500 Received: from mailhost.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id 55C1010C13A9; Fri, 9 Nov 2018 00:43:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1541753009; bh=HzAGJthD6OOUrbxW5RfuiLsEv3mNoxl3BsPoBs8F/M4=; h=From:To:CC:Subject:Date:References:From; b=kyOZHZ8sn3MbGzA0964Mn7AUi/WTlMlgUciTRwEgtEkZR6h7ALqdpAg9+nfbEBUmo Q3Efqws2HIm19wv6Teol/HafEKoU40x6KwEQxN5UGx0JStkOwNbmjyeoClXVqNgyMU u96LJVDkgi/Fj7a2wZh32gKkOUTox2bGMpNjb4xywxzqnzJSnOh1lILe9g7zbQNzO1 YxQzltax8nz2rBsmLzfY8Fo2aBvofor53t/F19kTLmzL/j+PfpLn1QrAexHvwULMAC 9zj0HuMzzZuWlrs/7wP3Q39tR9fvplwQwMubGIBACzOlhQ7RScFg5DKyKJeeAhXoDh Rww91gnnlF9bw== Received: from US01WXQAHTC1.internal.synopsys.com (us01wxqahtc1.internal.synopsys.com [10.12.238.230]) by mailhost.synopsys.com (Postfix) with ESMTP id 003465BC6; Fri, 9 Nov 2018 00:43:28 -0800 (PST) Received: from AM04WEHTCA.internal.synopsys.com (10.116.16.190) by US01WXQAHTC1.internal.synopsys.com (10.12.238.230) with Microsoft SMTP Server (TLS) id 14.3.408.0; Fri, 9 Nov 2018 00:43:28 -0800 Received: from AM04WEMBXA.internal.synopsys.com ([fe80::79c3:55f2:1f20:5bf4]) by am04wehtca.internal.synopsys.com ([::1]) with mapi id 14.03.0415.000; Fri, 9 Nov 2018 12:43:25 +0400 From: Minas Harutyunyan To: John Keeping , Minas Harutyunyan CC: Greg Kroah-Hartman , "linux-usb@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "arthur.petrosyan@synopsys.com" Subject: Re: [PATCH] usb: dwc2: gadget: fix ISOC frame overflow handling Thread-Topic: [PATCH] usb: dwc2: gadget: fix ISOC frame overflow handling Thread-Index: AQHUatZW7CBOg1jSlEOevZqXY6bG3Q== Date: Fri, 9 Nov 2018 08:43:24 +0000 Message-ID: <410670D7E743164D87FA6160E7907A56013A7A0F2B@am04wembxa.internal.synopsys.com> References: <20181023134355.29829-1-john@metanate.com> <410670D7E743164D87FA6160E7907A56013A79E7CE@am04wembxa.internal.synopsys.com> <20181108173654.118f9e3e@donbot> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.116.70.150] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi John,=0A= =0A= On 11/8/2018 9:37 PM, John Keeping wrote:=0A= > Hi Minas,=0A= > =0A= > On Mon, 5 Nov 2018 08:28:07 +0000=0A= > Minas Harutyunyan wrote:=0A= > =0A= >> On 10/23/2018 5:43 PM, John Keeping wrote:=0A= >>> By clearing the overrun flag as soon as the target frame is next=0A= >>> incremented, we can end up incrementing the target frame more than=0A= >>> expected in dwc2_gadget_handle_ep_disabled() when the endpoint's=0A= >>> interval is greater than 1. This happens if the target frame has=0A= >>> just wrapped at the point when the endpoint is disabled and the=0A= >>> frame number has not yet done so.=0A= >>>=0A= >>> Instead, wait until the frame number also wraps and then clear the=0A= >>> overrun flag.=0A= >>>=0A= >>> Signed-off-by: John Keeping =0A= >>> ---=0A= >>> drivers/usb/dwc2/gadget.c | 2 +-=0A= >>> 1 file changed, 1 insertion(+), 1 deletion(-)=0A= >>>=0A= >>> diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c=0A= >>> index 2d6d2c8244de..8da2c052dfa1 100644=0A= >>> --- a/drivers/usb/dwc2/gadget.c=0A= >>> +++ b/drivers/usb/dwc2/gadget.c=0A= >>> @@ -117,7 +117,7 @@ static inline void=0A= >>> dwc2_gadget_incr_frame_num(struct dwc2_hsotg_ep *hs_ep) if=0A= >>> (hs_ep->target_frame > DSTS_SOFFN_LIMIT) { hs_ep->frame_overrun =3D=0A= >>> true; hs_ep->target_frame &=3D DSTS_SOFFN_LIMIT;=0A= >>> - } else {=0A= >>> + } else if (hs_ep->parent->frame_number <=0A= >>> hs_ep->target_frame) { hs_ep->frame_overrun =3D false;=0A= >>> }=0A= >>> }=0A= >>> =0A= >> Did you tested mentioned by you scenario? If you see issue can you=0A= >> provide debug log and point the issue line in the log.=0A= > =0A= > It only reproduces very occasionally so it's difficult to capture a full= =0A= > debug log containing the error.=0A= > =0A= > I applied this patch to capture logging specifically around this=0A= > scenario:=0A= > =0A= > -- >8 --=0A= > diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c=0A= > index 220c0f9b89b0..3770b9d3b523 100644=0A= > --- a/drivers/usb/dwc2/gadget.c=0A= > +++ b/drivers/usb/dwc2/gadget.c=0A= > @@ -2722,13 +2722,20 @@ static void dwc2_gadget_handle_ep_disabled(struct= dwc2_hsotg_ep *hs_ep)=0A= > }=0A= > =0A= > do {=0A= > + unsigned int target_frame =3D hs_ep->target_frame;=0A= > + bool frame_overrun =3D hs_ep->frame_overrun;=0A= > +=0A= > hs_req =3D get_ep_head(hs_ep);=0A= > if (hs_req)=0A= > dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req= ,=0A= > -ENODATA);=0A= > +=0A= > dwc2_gadget_incr_frame_num(hs_ep);=0A= > /* Update current frame number value. */=0A= > hsotg->frame_number =3D dwc2_hsotg_read_frameno(hsotg);= =0A= > +=0A= > + dev_warn(hsotg->dev, "%s: expiring request frame_number= =3D0x%04x target_frame=3D0x%04x overrun=3D%u\n",=0A= > + __func__, hsotg->frame_number, target_frame, fra= me_overrun);=0A= > } while (dwc2_gadget_target_frame_elapsed(hs_ep));=0A= > =0A= > dwc2_gadget_start_next_request(hs_ep);=0A= > -- 8< --=0A= > =0A= > and I captured this log (the first entry is a separate error and then=0A= > the remaining ones show this bug being triggered):=0A= > =0A= > [ 562.571227] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3eb9 target_frame=3D0x3ec0=0A= > [ 562.611213] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff8 target_frame=3D0x0008=0A= > [ 562.611219] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff8 target_frame=3D0x0010=0A= > [ 562.611223] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0018=0A= > [ 562.611228] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0020=0A= > [ 562.611232] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0028=0A= > [ 562.611236] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0030=0A= > [ 562.611240] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0038=0A= > [ 562.611244] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0040=0A= > [ 562.611249] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0048=0A= > [ 562.611253] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0050=0A= > [ 562.611257] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0058=0A= > [ 562.611261] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0060=0A= > [ 562.611265] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0068=0A= > [ 562.611269] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0070=0A= > [ 562.611274] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0078=0A= > [ 562.611278] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0080=0A= > [ 562.611282] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0088=0A= > [ 562.611286] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0090=0A= > [ 562.611290] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x0098=0A= > [ 562.611294] dwc2 ff580000.usb: dwc2_gadget_handle_ep_disabled: expirin= g request frame_number=3D0x3ff9 target_frame=3D0x00a0=0A= > =0A= According above patch in debug log should be printed overrun flag also. =0A= Could you please resend log with this flag.=0A= =0A= > =0A= > This was on v4.19 with an additional patch to disable descriptor DMA=0A= > because that seems to be causing problems on RK3288 although I haven't=0A= > figured out exactly why it's a problem.=0A= =0A= In which mode you run tests Slave or Buffer DMA?=0A= > =0A= > =0A= > Regards,=0A= > John=0A= > =0A= =0A= Thanks,=0A= Minas=0A= =0A= From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: usb: dwc2: gadget: fix ISOC frame overflow handling From: Minas Harutyunyan Message-Id: <410670D7E743164D87FA6160E7907A56013A7A0F2B@am04wembxa.internal.synopsys.com> Date: Fri, 9 Nov 2018 08:43:24 +0000 To: John Keeping , Minas Harutyunyan Cc: Greg Kroah-Hartman , "linux-usb@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "arthur.petrosyan@synopsys.com" List-ID: SGkgSm9obiwKCk9uIDExLzgvMjAxOCA5OjM3IFBNLCBKb2huIEtlZXBpbmcgd3JvdGU6Cj4gSGkg TWluYXMsCj4gCj4gT24gTW9uLCA1IE5vdiAyMDE4IDA4OjI4OjA3ICswMDAwCj4gTWluYXMgSGFy dXR5dW55YW4gPG1pbmFzLmhhcnV0eXVueWFuQHN5bm9wc3lzLmNvbT4gd3JvdGU6Cj4gCj4+IE9u IDEwLzIzLzIwMTggNTo0MyBQTSwgSm9obiBLZWVwaW5nIHdyb3RlOgo+Pj4gQnkgY2xlYXJpbmcg dGhlIG92ZXJydW4gZmxhZyBhcyBzb29uIGFzIHRoZSB0YXJnZXQgZnJhbWUgaXMgbmV4dAo+Pj4g aW5jcmVtZW50ZWQsIHdlIGNhbiBlbmQgdXAgaW5jcmVtZW50aW5nIHRoZSB0YXJnZXQgZnJhbWUg bW9yZSB0aGFuCj4+PiBleHBlY3RlZCBpbiBkd2MyX2dhZGdldF9oYW5kbGVfZXBfZGlzYWJsZWQo 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