linux-kernel - Re: [PATCH V2] USBIP: return correct port ENABLE status

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Message-ID: <df20aa7e-36f9-d68c-065f-59ee0c224259@kernel.org>
Date:   Tue, 9 Jan 2018 10:44:05 -0700
From:   Shuah Khan <shuah@...nel.org>
To:     pei.zhang@...el.com, valentina.manea.m@...il.com,
        gregkh@...uxfoundation.org
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shuah Khan <shuahkh@....samsung.com>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH V2] USBIP: return correct port ENABLE status

On 12/18/2017 11:00 PM, pei.zhang@...el.com wrote:
> From: Pei Zhang <pei.zhang@...el.com>
> 
> USB system will clear port's ENABLE feature for some USB devices when
> vdev is already assigned port address. This cause getPortStatus reports
> to system that this device is not enabled, client OS will failed to use
> this usb device.
> 
> The failure devices include a SAMSUNG SSD storage, Logitech webcam C920.
> 
> V2: send again to all related maintainers.
> 
> Signed-off-by: Pei Zhang <pei.zhang@...el.com>

Hi Pei Zhang,

Can you elaborate on how you can trigger this condition? Can you send me
more information on how to recreate the problem and demsg from server and
client side when this problem happens.

thanks,
-- Shuah