linux-kernel - Re: [PATCH] usbip: Don't submit special requests twice

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Message-ID: <b0ab598c-4303-449d-8a01-349e642d8c11@linuxfoundation.org>
Date:   Mon, 27 Nov 2023 15:33:50 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Simon Holesch <simon@...esch.de>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>, Hongren Zheng <i@...ithal.me>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] usbip: Don't submit special requests twice

On 11/26/23 16:48, Simon Holesch wrote:
> Even though submitting those requests twice should be harmless, there
> are USB devices that react poorly to some duplicated requests.
> 

The change looks good to me. I want to see the change explained in
the commit log. I see the information on why the change is needed.

Please add a bit more information on the change.

> One example is the ChipIdea controller implementation in U-Boot: The
> second SET_CONFIURATION request makes U-Boot disable and re-enable all
> endpoints. Re-enabling an endpoint in the ChipIdea controller, however,
> was broken until U-Boot commit b272c8792502 ("usb: ci: Fix gadget
> reinit").
> 
> Signed-off-by: Simon Holesch <simon@...esch.de>

thanks,
-- Shuah