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Date:   Thu, 20 May 2021 10:16:33 -0400
From:   Alan Stern <stern@rowland.harvard.edu>
To:     "Matwey V. Kornilov" <matwey.kornilov@gmail.com>
Cc:     hminas@synopsys.com,
        "open list:MUSB MULTIPOINT HIGH SPEED DUAL-ROLE CONTROLLER" 
        <linux-usb@vger.kernel.org>
Subject: Re: Odroid C4: dwc2_hsotg_start_req: ep1 is stalled
Message-ID: <20210520141633.GB1203032@rowland.harvard.edu>
References: <CAJs94EbV6+C81NggHtnJGZ8aoeW12POhv4zi0RTawuDcf+ybFA@mail.gmail.com>
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On Thu, May 20, 2021 at 03:35:26PM +0300, Matwey V. Kornilov wrote:
> Hi,
> 
> I am running upstream Linux 5.12.3 on an Odroid C4 board and see lots
> of the following lines in dmesg while using the gadget mass storage
> driver. I suppose that this can indicate some issue in the dwc2
> driver.
> 
> [  189.752586] dwc2 ff400000.usb: bound driver g_mass_storage
> [  190.118994] dwc2 ff400000.usb: new device is high-speed
> [  190.199074] dwc2 ff400000.usb: new device is high-speed
> [  190.267855] dwc2 ff400000.usb: new address 4
> [  191.310603] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 1)
> [  191.310737] dwc2 ff400000.usb: dwc2_hsotg_start_req: ep1 is stalled
> [  191.311015] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 0)
> [  191.312257] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 1)
> [  191.312373] dwc2 ff400000.usb: dwc2_hsotg_start_req: ep1 is stalled
> [  191.312762] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 0)
> [  191.336959] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 1)
> [  191.447759] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 1)
> [  191.447823] dwc2 ff400000.usb: dwc2_hsotg_start_req: ep1 is stalled
> [  191.448098] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 0)
> [  191.448550] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 1)
> [  191.567748] dwc2 ff400000.usb: dwc2_hsotg_ep_sethalt(ep
> 00000000ce48180a ep1in, 1)

Those look like they ought to be debugging messages.  They don't seem to 
indicate any problem.

Alan Stern