linux-kernel - Re: [PATCH 1/2] USB:ehci:Add a whitelist for EHCI controllers

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Message-ID: <0d5963d0-9e25-5411-67df-146bf924fc17@huawei.com>
Date:   Thu, 8 Apr 2021 17:44:39 +0800
From:   liulongfang <liulongfang@...wei.com>
To:     Oliver Neukum <oneukum@...e.com>, <gregkh@...uxfoundation.org>,
        <mathias.nyman@...el.com>, <stern@...land.harvard.edu>,
        <liudongdong3@...wei.com>
CC:     <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kong.kongxinwei@...ilicon.com>, <yisen.zhuang@...wei.com>
Subject: Re: [PATCH 1/2] USB:ehci:Add a whitelist for EHCI controllers

On 2021/4/8 17:33, Oliver Neukum wrote:
> Am Donnerstag, den 08.04.2021, 17:11 +0800 schrieb Longfang Liu:
>> Some types of EHCI controllers do not have SBRN registers.
>> By comparing the white list, the operation of reading the SBRN
>> registers is skipped.
>>
>> Subsequent EHCI controller types without SBRN registers can be
>> directly added to the white list.
> 
> Hi,
> 
> shouldn't this set a flag for a missing functionality?
> 
> 	Regards
> 		Oliver
> 
> 
> .
> 
This flag is ehci->sbrn.
Thanks,
Longfang