On Tue, 31 Jul 2007 13:35:54 -0400 (EDT) Alan Stern <[EMAIL PROTECTED]> wrote:
> > Hmmm. So if you stop before the "modprobe cdc-acm" step there's no > trouble with "rmmod uhcd-hcd". What about if you do load cdc-acm but > don't run the fax program? > Here are some variations. I plug in the external usb modem. Then, the commands: [/]# modprobe uhci-hcd [/]# modprobe cdc-acm [/]# mount -t usbfs none /proc/bus/usb No fax program is invoked. I just wait for a minute, then I try to unload: [/]# umount /proc/bus/usb [/]# rmmod cdc_acm [/]# rmmod uhci_hcd Killed The module is not unloaded and the kernel log has the oops error. Now, I unplug the modem. [/]# rmmod uhci_hcd ERROR: Removing 'uhci_hcd': Device or resource busy The module is still not unloaded. Next, after rebooting, I do not plug in the modem. Then: [/]# modprobe uhci-hcd [/]# modprobe cdc-acm [/]# mount -t usbfs none /proc/bus/usb No fax program is invoked. I just wait for a minute, then I try to unload: [/]# umount /proc/bus/usb [/]# rmmod cdc_acm [/]# rmmod uhci_hcd The module uhci-hcd is now successfully unloads without problem. So, it seems that the cdc_acm module, after it detects the modem, sets up the cause for the unloading failure. Also, without first loading cdc-acm there is no problem: [/]# modprobe uhci-hcd Then: [/]# rmmod uhci-hcd usbcore The uhci-hcd module unloads without problem. AK ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
