Disabling certain error logging?

Hi list,

i do have an ugly problem. I have built yet another avr-software-usb based device
to connect an c64 disk drive to usb to be able to read and write those old c64 disks
(see http://www.harbaum.org/till/xu1541).

Sowhere during development i recognized that there are things inside the c64's IEC 
protocol that require a very exact timing. Thus i had to disable IRQ handling in 
the device during IEC transfers which in turn causes the USB to not be handled for
a certain time. My PC side libusb based software can cope with this fact and retries
if it encounters USB errors in these moments.

But of course this is what my syslog looks afterwards:

...
Mar 15 14:21:30 oekaluxXX kernel: [17203129.028000] usb 2-2: usbfs: USBDEVFS_CONTROL failed cmd cbmctrl rqt 160 rq 13 len 2 ret -71
Mar 15 14:21:30 oekaluxXX kernel: [17203129.032000] usb 2-2: usbfs: USBDEVFS_CONTROL failed cmd cbmctrl rqt 160 rq 13 len 2 ret -71
Mar 15 14:21:30 oekaluxXX kernel: [17203129.036000] usb 2-2: usbfs: USBDEVFS_CONTROL failed cmd cbmctrl rqt 160 rq 13 len 2 ret -71
Mar 15 14:21:30 oekaluxXX kernel: [17203129.040000] usb 2-2: usbfs: USBDEVFS_CONTROL failed cmd cbmctrl rqt 160 rq 13 len 2 ret -71
...

Can i get rid of these messages other than fixing USB on my device? I know, it's 
very ugly what i am doing, but it's working for that simple purpose it's been built for 
and i currently can't get USB and IEC to work at the same time. I am of course trying 
that as well, but just in case i can't i'll have to live with these errors and would like to 
know if i can suppress them.

Till


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