Hi
Apologies in advance if it's felt this is the wrong mailinglist.

I'm developing g15daemon & libg15, which is a userspace driver for the 
logitech G15 keyboard and it's LCD, using libusb.  Kernels up to and 
including the 2.6.17 series have been working fine, however users who've 
upgraded to 2.6.18-rc1 and above, and who use an intel (i945, possibly others 
too) chipset are seeing their syslog filled with:

usbfs: usb_submit_urb returned -22 
usbfs: usb_submit_urb returned -22 
usbfs: usb_submit_urb returned -22 
usbfs: usb_submit_urb returned -22 
etc.. to the tune of 10 or so a second.  

The userspace code (once the device is setup) which appears to provoke this 
warning simply polls the keyboard with usb_interrupt_read() every 
50-100milliseconds.

The keyboard still works fine, apparently.  I've been unable to replicate 
this, it doesnt appear to affect VIA (and possibly other uhci) chipsets, and 
I dont currently have an intel board available for testing.  Users who have 
gone to the trouble of adding 3rd-party pci usb ports report that the problem 
goes away when not using the onboard usb chipset.

I'm attempting to narrow down an exact cause (and whether I can work around it 
in userspace) and would greatly appreciate a pointer or two on the most 
likely culprits in the kernel code (if any), as I realise there were numerous 
changes to the usb subsystem in 2.6.18.  I know I'm asking for a shot in the 
dark here, due to the sparsity of information, but any ideas would be 
helpful.

Thanks,
Mike

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