Re: CVS commit: src/sys/dev/usb

[Michael van Elst <mlelstv%serpens.de@localhost>]

On Thu, Jan 31, 2019 at 02:51:44PM +0900, Rin Okuyama wrote:
> On 2019/01/30 21:26, Michael van Elst wrote:
> > Do multiple outstanding requests show an advantage on your LAN7500
> > devices?
> 
> Yes. There is significant improvement in receiving performance.

Then lets see if the chip revision makes a difference, I'll prepare
a patch.


> By the way, I find that the system hangs silently by
> "ifconfig mueN down" or detaching LAN7500 from USB port when
> multiple outstanding requests are enabled. This does not occur
> when MUE_TX_LIST_CNT = MUE_RX_LIST_CNT = 1. Do you have any ideas
> to fix it?

ifconfig down calls mue_stop() which call mue_reset() but which is
a dummy (the call to mue_chip_init is commented out). It should still
abort the transfers which should be enough.

The RPI3 (LAN7800) doesn't have this problem.


Greetings,
-- 
                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."