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Date:   Fri, 8 Jan 2021 02:19:30 +0000
From:   Thinh Nguyen <>
To:     Felipe Balbi <>,
        Wesley Cheng <>,
        "" <>,
        "" <>
CC:     "" <>,
        "" <>
Subject: Re: [PATCH 2/3] usb: gadget: composite: Split composite reset and

Hi Wesley,

Felipe Balbi wrote:
> Hi,
> Wesley Cheng <> writes:
>> +void composite_reset(struct usb_gadget *gadget)
>> +{
>> +	/*
>> +	 * Section 1.4.13 Standard Downstream Port of the USB battery charging
>> +	 * specification v1.2 states that a device connected on a SDP shall only
>> +	 * draw at max 100mA while in a connected, but unconfigured state.
> The requirements are different, though. I think OTG spec has some extra
> requirements where only 8mA can be drawn max. You need to check for the
> otg flag. Moreover, USB3+ spec has units of 150mA meaning the device
> can't draw 100mA (IIRC).

We see issue with this patch series. For our device running at SSP, the
device couldn't recover from a port reset and remained in eSS.Inactive

This patch series is already in Greg's usb-testing. Please review and
help fix it.

We can see the failure once the patch "usb: gadget: configfs: Add a
specific configFS reset callback" is introduced.


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