Re: [PATCH] USB: host: ehci: allow tine of highspeed nak-count

From: Greg KH
Date: Mon Jan 07 2019 - 11:19:11 EST


On Wed, Nov 14, 2018 at 05:13:15PM +0000, Ben Dooks wrote:
> From: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
>
> At least some systems benefit with less scheduling if the NAK count
> value is set higher than the default 4. For instance a Tegra3 with
> an SMSC9512 showed less interrupt load when this was changed to 14.
>
> To allow the changing of this value, add a sysfs node to each of
> the controllers to allow run-time changing.

That's going to be a pain, why can you not just figure this out at
runtime and adjust it that way?

Also, you can't add a sysfs file and not also add a Documentation/API/
update :(

Can you fix this up to work without needing manual adjustments?

thanks,

greg k-h