On Mon 17 May 2010 14:35 +0200, Khanh-Dang Nguyen Thu Lam wrote: > > > ATM dev 0: usbatm_submit_urb: urb 0xcfa8a9a0 submission failed (-28)! > > > > -28 is -ENOSPC, which means there is not enough bandwidth available on > > the USB bus for both devices to run at the same time. > > I have found a a similar issue: > http://www.mail-archive.com/ueagleatm-dev@xxxxxxx/msg00633.html OK. I now have a workaround: load ueagle_atm with altsetting=1. >From /sbin/modinfo ueagle_atm: altsetting:alternate setting for incoming traffic: 0=bulk, 1=isoc slowest, ... , 8=isoc fastest (default) When ueagle_atm is loaded with default setting (altsetting=8), the two devices cannot work together. With altsetting=0 (bulk mode), ueagle_atm cannot load properly. I get: # [ueagle-atm] driver ueagle 1.4 loaded usb 1-2: [ueagle-atm] ADSL device founded vid (0X1110) pid (0X900F) Rev (0X410B): Eagle I usb 1-2: reset full speed USB device using uhci_hcd and address 3 ueagle-atm 1-2:1.0: usbatm_usb_probe: invalid endpoint 02! usb 1-2: [UEAGLE-ATM] uea_intr() failed with -2 ueagle-atm: probe of 1-2:1.0 failed with error -22 usbcore: registered new interface driver ueagle-atm # This might be another ueagle_atm's issue. Everything seems to work as expected with altsetting=1. I haven't tested other intermediate altsetting's values yet but I expect things to work when this value is not too high. I now have a question about these two lines in /proc/bus/usb/devices: # I:* If#= 2 Alt= 1 #EPs= 1 Cls=0a(data ) Sub=00 Prot=00 Driver=ueagle-atm E: Ad=88(I) Atr=01(Isoc) MxPS= 159 Ivl=1ms # Does it mean that ueagle-atm has allocated a bandwidth of 159B / 1ms (i.e. 159kBi/s) for incoming data? If so, what happens if the modem receives more than 159kBi/s? Does the USB specs allow the modem to use more USB bandwidth than allocated (when in isochronous mode)? Khanh-Dang Nguyen Thu Lam -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
