linux-kernel - RE: [PATCH v3] USB: dummy-hcd: fix power budget for SuperSpeed mode

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Date:   Fri, 6 Sep 2019 09:04:06 +0000
From:   <Jacky.Cao@...y.com>
To:     <gregkh@...uxfoundation.org>
CC:     <balbi@...nel.org>, <stern@...land.harvard.edu>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <Kento.A.Kobayashi@...y.com>, <Jacky.Cao@...y.com>
Subject: RE: [PATCH v3] USB: dummy-hcd: fix power budget for SuperSpeed mode

Hi, 

> 
> Does this "fix" a specific commit in the tree, and if so, what is the commit id of
> that?  Also, should this go to the stable kernel(s)?
> 
> thanks,
> 
> greg k-h

No, this fix is not for specific commit since the POWER_BUDGET(500mA) is used for 
SuperSpeed mode when dummy hcd added SuperSpeed support in commit(1cd8fd2887).

And I think it should be imported to stable kernel(s) considering the "insufficient
available bus power error" mentioned in commit message really happens. We reproduced
this issue with linux-3.10, linux-4.9 which we use and confirmed it can be solved by
this modification.

Regards
Jacky