Re: Bug 103411 - Ethernet frames get broken for g_ether / g_cdc

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On Tue, 2015-12-01 at 14:44 +0100, Bjørn Mork wrote:
> Oliver Neukum <oneukum@xxxxxxxx> writes:
> 
> > On Tue, 2015-12-01 at 10:41 +0100, Alexander Krause wrote:
> >
> >> Messages on the host are:
> >> [44685.879438] usb 3-1.2: new high-speed USB device number 83 using
> >> xhci_hcd
> >> [44685.979721] usb 3-1.2: config 1 interface 0 altsetting 0 endpoint
> >> 0x83 has an invalid bInterval 32, changing to 9
> >> [44685.979726] usb 3-1.2: config 1 interface 1 altsetting 1 bulk
> >> endpoint 0x81 has invalid maxpacket 64
> >> [44685.979729] usb 3-1.2: config 1 interface 1 altsetting 1 bulk
> >> endpoint 0x2 has invalid maxpacket 64
> >> [44685.979731] usb 3-1.2: config 1 interface 2 altsetting 0 endpoint
> >> 0x86 has an invalid bInterval 32, changing to 9
> >> [44685.979734] usb 3-1.2: config 1 interface 3 altsetting 0 bulk
> >> endpoint 0x84 has invalid maxpacket 64
> >> [44685.979736] usb 3-1.2: config 1 interface 3 altsetting 0 bulk
> >> endpoint 0x5 has invalid maxpacket 64
> >> [44685.980032] usb 3-1.2: New USB device found, idVendor=0525,
> >> idProduct=a4aa
> >> [44685.980035] usb 3-1.2: New USB device strings: Mfr=1, Product=2,
> >> SerialNumber=0
> >> [44685.980036] usb 3-1.2: Product: CDC Composite Gadget
> >> [44685.980038] usb 3-1.2: Manufacturer: Linux 4.2.6-arietta with
> >> atmel_usba_udc
> >> [44685.981609] cdc_ether 3-1.2:1.0 usb0: register 'cdc_ether' at usb
> >> -0000:00:14.0-1.2, CDC Ethernet Device, fa:b1:ab:00:00:01
> >> [44685.982199] cdc_acm 3-1.2:1.2: ttyACM0: USB ACM device
> >> [44686.036753] cdc_ether 3-1.2:1.0 enp0s20u1u2: renamed from usb0
> >> [44686.125452] IPv6: ADDRCONF(NETDEV_UP): enp0s20u1u2: link is not
> >> ready
> >
> > So far so good.
> 
> Really?  Doesn't the above warnings about bInterval and maxpacket
> indicate a high-speed gadget using full-speed descriptors?

Yes, OK, so far so survivable. It doesn't explain the strange
notifications.

	Regards
		Oliver


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