Hello, sorry for my late reply. schrieb Greg KH on 24.07.2011 05:20: > On Fri, Jul 22, 2011 at 03:16:13PM +0200, Georg Beyerle wrote: >> I access external hardware thru usbserial: >> >> # modprobe usbserial vendor=0xNNNN product=0xN >> >> With kernel 2.6.34 (version 2.6.34.8-0.2-default, >> OpenSUSE 11.3) it was possible to remove usbserial >> without physically disconnecting this device: >> >> # modprobe -r usbserial >> >> With kernel 2.6.37 (version 2.6.37.6-0.5-default, >> OpenSUSE 11.4) this no longer works, removal of >> usbserial fails with: >> >> # modprobe -r usbserial >> FATAL: Module usbserial is in use. >> >> The device needs to be disconnected before removal >> of the module succeeds. Is there an option to get >> back the original (2.6.34) behaviour? > > I doubt this really worked the same way in .34. You must still have a > device node open in .37, which is keeping the module from being > unloaded. Yes, you're right. It turns out that in OpenSUSE 11.4 ModemManager grabs the device /dev/ttyUSB0: # lsof /dev/ttyUSB0 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME modem-man 1280 root 23u CHR 188,0 0t0 14224 /dev/ttyUSB0 Uninstalling ModemManager solves the problem; I apologize for the waste of bandwidth. > Why would you want to unload the module anyway? The external device has to be re-booted (command is sent via RS232, USB link is only for data transfer) at a certain stage and this process requires unloading/re-loading of 'usbserial'. Thanks Georg -- 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
