linux-kernel - Re: [PATCH] usb: gadget: aspeed: Fix probe regression

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Message-ID: <75d65e4c-961a-0338-8101-d1ea05542dd6@quicinc.com>
Date:   Mon, 17 Oct 2022 13:59:53 -0700
From:   Jae Hyun Yoo <quic_jaehyoo@...cinc.com>
To:     Joel Stanley <joel@....id.au>, Zev Weiss <zev@...ilderbeest.net>
CC:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Andrew Jeffery <andrew@...id.au>, <linux-usb@...r.kernel.org>,
        <linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
        <stable@...r.kernel.org>
Subject: Re: [PATCH] usb: gadget: aspeed: Fix probe regression

On 10/17/2022 1:40 PM, Zev Weiss wrote:
> On Sun, Oct 16, 2022 at 10:30:06PM PDT, Joel Stanley wrote:
>> Since commit fc274c1e9973 ("USB: gadget: Add a new bus for gadgets"),
>> the gadget devices are proper driver core devices, which caused each
>> device to request pinmux settings:
>>
>> aspeed_vhub 1e6a0000.usb-vhub: Initialized virtual hub in USB2 mode
>> aspeed-g5-pinctrl 1e6e2080.pinctrl: pin A7 already requested by 
>> 1e6a0000.usb-vhub; cannot claim for gadget.0
>> aspeed-g5-pinctrl 1e6e2080.pinctrl: pin-232 (gadget.0) status -22
>> aspeed-g5-pinctrl 1e6e2080.pinctrl: could not request pin 232 (A7) 
>> from group USB2AD  on device aspeed-g5-pinctrl
>> g_mass_storage gadget.0: Error applying setting, reverse things back
>>
>> The vhub driver has already claimed the pins, so prevent the gadgets
>> from requesting them too by setting the magic of_node_reused flag. This
>> causes the driver core to skip the mux request.
>>
>> Reported-by: Zev Weiss <zev@...ilderbeest.net>
>> Reported-by: Jae Hyun Yoo <quic_jaehyoo@...cinc.com>
>> Fixes: fc274c1e9973 ("USB: gadget: Add a new bus for gadgets")
>> Cc: stable@...r.kernel.org
>> Signed-off-by: Joel Stanley <joel@....id.au>
> 
> Thanks Joel!
> 
> Tested-by: Zev Weiss <zev@...ilderbeest.net>

It works for my AST2600 build targets too. Thanks Joel!

Tested-by: Jae Hyun Yoo <quic_jaehyoo@...cinc.com>