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From: Otavio Salvador <otavio.salvador@ossystems.com.br>
To: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
	Felipe Balbi <balbi@kernel.org>, Heiko Stuebner <heiko@sntech.de>,
	"linux-rockchip@lists.infradead.org" 
	<linux-rockchip@lists.infradead.org>,
	Johan Hovold <johan@kernel.org>
Subject: Re: USB DWC2 stops responding when insert/remove cable multiple times
Date: Wed, 19 Feb 2020 12:10:31 -0300
Message-ID: <CAP9ODKqL_GN+iebL3wPX_9fEUtUVP8Ahv03yJ1R-JLDr=Cn0BA@mail.gmail.com> (raw)
In-Reply-To: <380d765b-8867-a899-b67a-c016c09fa27b@synopsys.com>

Hello Minas,

On Wed, Feb 19, 2020 at 9:26 AM Minas Harutyunyan
<Minas.Harutyunyan@synopsys.com> wrote:
> On 2/17/2020 11:53 PM, Otavio Salvador wrote:
> > On Mon, Feb 17, 2020 at 10:26 AM Minas Harutyunyan
> > <Minas.Harutyunyan@synopsys.com> wrote:
> >> Enable debug prints to get full dwc2 debug prints to see what happen
> >> with dwc2.
>
> > [ 1054.529774] dwc2 30180000.usb: ep0 state:0
> > [ 1054.529785] dwc2 30180000.usb: dwc2_hsotg_start_req: DxEPCTL=0x84088200
> > [ 1054.529801] dwc2 30180000.usb: dwc2_hsotg_start_req: DXEPCTL=0x80088200
> > [ 1054.529928] dwc2 30180000.usb: ep2out: req 26bd9b9f: 512@06b7dbca,
> > noi=0, zero=0, snok=0
> > [ 1054.537095] dwc2 30180000.usb: dwc2_hsotg_irq: 04008428 00000400
> > (d88c3cc4) retry 8
> > [ 1054.537119] dwc2 30180000.usb: GINTSTS_ErlySusp
> > [ 1054.540147] dwc2 30180000.usb: gintsts=04008828  gintmsk=d88c3cc4
> > [ 1054.540172] dwc2 30180000.usb: USB SUSPEND
> > [ 1054.540191] dwc2 30180000.usb: dwc2_handle_usb_suspend_intr: DSTS=0x5ad801
> > [ 1054.540211] dwc2 30180000.usb: DSTS.Suspend Status=1 HWCFG4.Power
> > Optimize=1 HWCFG4.Hibernation=0
> > [ 1054.540242] dwc2 30180000.usb: dwc2_hsotg_irq: 04008028 00000000
> > (d88c3cc4) retry 8
> > [ 1054.585402] dwc2 30180000.usb: ep1in: req 01eff31b: 353@bf8d62d8,
> > noi=0, zero=1, snok=0
> > [ 1054.585422] dwc2 30180000.usb: dwc2_hsotg_ep_queue: submit request
> > only in active state
> > [ 1054.661667] dwc2 30180000.usb: dwc2_hsotg_irq: 04008428 00000400
> > (d88c3cc4) retry 8
> > [ 1054.661694] dwc2 30180000.usb: GINTSTS_ErlySusp
> > [ 1054.664715] dwc2 30180000.usb: gintsts=04008828  gintmsk=d88c3cc4
> > [ 1054.664741] dwc2 30180000.usb: USB SUSPEND
> > [ 1054.664760] dwc2 30180000.usb: dwc2_handle_usb_suspend_intr: DSTS=0x5ad801
> > [ 1054.664781] dwc2 30180000.usb: DSTS.Suspend Status=1 HWCFG4.Power
> >
>
> Actually, I don't see any issue with dwc2 from the log. Only not clear
> why SUSPEND happen hear. Is it because of disconnect/connect or
> reloading g_serial?
> Is this log recorded when issue seen?

Yes, the log was recorded however we did not reload the g_serial
module. So when we gathered the logs, it was stuck.

> Anyway, before SUSPEND and after dwc2 successfully perform transfers on
> all EP's - ep1in bulk, ep2out bulk and ep3in interrupt.
> Can you provide dmesg with dwc2 debug prints with exception case inside.

The log I sent was taken with:

1) boot device
2) ran 'dmesg -c' so we cleaned the old messages
3) cause the lock up to happen
4) gather dmesg output

What sequence do you want us to do?
--
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
Mobile: +55 (53) 9 9981-7854          Mobile: +1 (347) 903-9750

  reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-14 13:40 Otavio Salvador
2020-02-17  8:58 ` Minas Harutyunyan
2020-02-17 12:30   ` Otavio Salvador
2020-02-17 13:26     ` Minas Harutyunyan
2020-02-17 19:53       ` Otavio Salvador
2020-02-19 12:26         ` Minas Harutyunyan
2020-02-19 15:10           ` Otavio Salvador [this message]
2020-02-20  6:59             ` Minas Harutyunyan
2020-02-20 13:16               ` Otavio Salvador
2020-02-21  6:52                 ` Minas Harutyunyan
2020-02-21 14:06                   ` Otavio Salvador
     [not found]                     ` <CAP9ODKoRuB-nyjr1ksGU61PVMjFTMMWKwgpHQ=e7bChAu5Okhg@mail.gmail.com>
2020-02-28  9:01                       ` Minas Harutyunyan
2020-02-28 17:35                         ` Otavio Salvador
2020-03-05  6:45                           ` Minas Harutyunyan

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