Bug#859641: Please increase USBIP_VHCI_HC_PORTS and USBIP_VHCI_NR_HCS

[Bjørn Mork <bjorn@mork.no>]

Steve McIntyre <steve@einval.com> writes:

> In Linaro we're making a lot of use of USB-over-IP devices these days
> for our testing lab. We've hit a (very small!) limit defined in kernel
> config for the number of virtual host controllers and the ports
> allowed per controller.
>
> Currently these are defaulting to
>
> CONFIG_USBIP_VHCI_HC_PORTS=8
> (can be 1 <= CONFIG_USBIP_VHCI_HC_PORTS <= 31)
>
> and
> CONFIG_USBIP_VHCI_NR_HCS=1
> (can be 1 <= CONFIG_USBIP_VHCI_NR_HCS <= 128)
>
> The normal limits are very small; could you please raise these to
> (say) 31 and 8 for us? There will obviously be a small increase in
> memory usage in the kernel, but only for users of these particular
> devices.

FWIW, I believe those constants never should have been accepted. But I
just gave up after getting this answer:
http://www.spinics.net/lists/linux-usb/msg134862.html

"Because it is easy to implement." was obviously more important than
easy to use...  I don't think distro users were considered.

If you care about these limits, then I think you should look into what
needs to be done to make them dynamic.  I cannot imagine that it is all
that difficult.  Which of course is easy to say when you don't actually
plan on doing the work :)



Bjørn