This patch (as950) fixes a bug in the cdc-acm driver. It doesn't keep track of which interface (control or data) the sysfs attributes get registered for, and as a result, during disconnect it will sometimes attempt to remove the attributes from the wrong interface. The left-over attributes can cause a crash later on, particularly if the driver module has been unloaded.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]> CC: Oliver Neukum <[EMAIL PROTECTED]> --- The same patch applies with a small offset to 2.6.22. Although the bug has been present all along, only the recent changes to the sysfs infrastructure have caused it to manifest. Alan Stern Index: usb-2.6/drivers/usb/class/cdc-acm.c =================================================================== --- usb-2.6.orig/drivers/usb/class/cdc-acm.c +++ usb-2.6/drivers/usb/class/cdc-acm.c @@ -921,6 +921,10 @@ skip_normal_probe: return -EINVAL; } } + + /* Accept probe requests only for the control interface */ + if (intf != control_interface) + return -ENODEV; if (usb_interface_claimed(data_interface)) { /* valid in this context */ dev_dbg(&intf->dev,"The data interface isn't available"); @@ -1109,10 +1113,12 @@ static void acm_disconnect(struct usb_in return; } if (acm->country_codes){ - device_remove_file(&intf->dev, &dev_attr_wCountryCodes); - device_remove_file(&intf->dev, &dev_attr_iCountryCodeRelDate); + device_remove_file(&acm->control->dev, + &dev_attr_wCountryCodes); + device_remove_file(&acm->control->dev, + &dev_attr_iCountryCodeRelDate); } - device_remove_file(&intf->dev, &dev_attr_bmCapabilities); + device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); acm->dev = NULL; usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); ------------------------------------------------------------------------- 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