linux-kernel - Re: [PATCH v2 0/2] USB:ehci:fix the no SRBN register problem

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Date:   Thu, 8 Apr 2021 10:53:32 -0400
From:   Alan Stern <stern@...land.harvard.edu>
To:     Longfang Liu <liulongfang@...wei.com>
Cc:     gregkh@...uxfoundation.org, mathias.nyman@...el.com,
        liudongdong3@...wei.com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, kong.kongxinwei@...ilicon.com,
        yisen.zhuang@...wei.com
Subject: Re: [PATCH v2 0/2] USB:ehci:fix the no SRBN register problem

On Thu, Apr 08, 2021 at 09:49:18PM +0800, Longfang Liu wrote:
> (1) Add a whitelist for EHCI devices without SBRN registers.
> (2) Add Kunpeng920's EHCI device to the whitelist.
> 
> Changes in v2:
> 	- Fix some code style issues.
> 	- Update function name.
> 
> Longfang Liu (2):
>   USB:ehci:Add a whitelist for EHCI controllers
>   USB:ehci:fix Kunpeng920 ehci hardware problem
> 
>  drivers/usb/host/ehci-pci.c | 30 ++++++++++++++++++++++++++----
>  1 file changed, 26 insertions(+), 4 deletions(-)

I don't think we need a whole list, along with an associated lookup 
routine, when there are only two entries.  The total amount of code will 
be smaller if you just add a check for the Kunpeng920 controller to
the existing check for the STMICRO controller.

Alan Stern