linux-kernel - Re: dwc2_hc_chhltd_intr_dma

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Date:   Mon, 3 Apr 2017 20:04:27 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     Minas Harutyunyan <Minas.Harutyunyan@...opsys.com>
Cc:     John Youn <John.Youn@...opsys.com>,
        lkml <linux-kernel@...r.kernel.org>,
        YongQin Liu <yongqin.liu@...aro.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: dwc2_hc_chhltd_intr_dma - ChHltd set errors?

On Mon, Apr 3, 2017 at 5:54 AM, Minas Harutyunyan
<Minas.Harutyunyan@...opsys.com> wrote:
> On 4/3/2017 9:23 AM, John Youn wrote:
>> On 03/31/2017 04:04 PM, John Stultz wrote:
>>> On Thu, Mar 2, 2017 at 12:00 PM, John Stultz <john.stultz@...aro.org> wrote:
>>>> Hey John,
>>>>   We've noticed that when using usb ethernet adapters on HiKey, we
>>>> occasionally see errors like:
>>>>
>>>> dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 0 - ChHltd set,
>>>> but reason is unknown
>>>> dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x06200029
>>>>
>>>> dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 11 - ChHltd set,
>>>> but reason is unknown
>>>> dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x04200029
>>>>
>>>> Sometimes followed up by a usb error in the driver, something like:
>>>> asix 1-1.2:1.0 eth0: asix_rx_fixup() Bad Header Length 0x36000807, offset 68
>>>>
>>>> Curious if you've seen any reports like this?
>
> The core version is less than 2.71a, am I right?

So it looks like its reporting 0x4f54300a for hsotg->regs + GSNPSID
which looks like DWC2_CORE_REV_3_00a

> Please send full debug log to do more investigation.

Full dmesg, or is there special debugging you want me to enable?

> Also send us regdump after connecting ethernet adapter.

Sorry, can you clarify how to generate this?

thanks
-john