Sami Farin <[email protected]> writes:
> On Mon, Feb 23, 2015 at 11:59:14 +0100, Bjørn Mork wrote:
>> So my conclusion is that there is some higher level USB communication
>> problem here, not directly involving neither usbnet nor the minidriver.
>
> Do you have new ideas as to where the problem might be?
> I have now used the cdc_ether driver to transfer 1 TiB with zero rx/tx errors.
OK, that is an indication that my wild guess was wrong.
I have really no idea why this fails. We obviously do something the
modem doesn't like, but I don't know what it is. Sorry
> I also noticed cdc_ether initialization or something does not work with kernel
> 4.0.0-rc4, I have to first setup it in 3.18.9 and then reboot to 4.0.0-rc4.
That is unexpected and even more difficult to explain. There aren't
many changes to usbnet or cdc_ether between v3.18 and v4.0-rc4:
bjorn@nemi:/usr/local/src/git/linux$ git log --oneline v3.18..v4.0-rc4 --
drivers/net/usb/{usbnet,cdc_ether}.c
51487ae736fe usbnet: re-use native hex2bin()
f46ad73ac696 cdc-ether: implement MULTICAST flag on the device
55b42b5ca2dc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
I gues the only possibility is the multicast filter change, but it
doesn't look like that should change anything by default. Any ideas on
this one, Oliver?
Bjørn
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