On Wed, 1 Aug 2007, Alan Stern wrote:
> Okay, good work. Thanks to your careful experiments, plus the hints
> from Oliver and Tejun, I figured out the problem. In short, the
> attribute files were registered on the control interface but the driver
> tried to delete them from the data interface. I'll post a patch
> tomorrow morning.
And here it is. You can remove the earlier diagnostic patches; this
one by itself should fix everything.
Alan Stern
Index: 2.6.22/drivers/usb/class/cdc-acm.c
===================================================================
--- 2.6.22.orig/drivers/usb/class/cdc-acm.c
+++ 2.6.22/drivers/usb/class/cdc-acm.c
@@ -919,6 +919,10 @@ 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");
@@ -1107,10 +1111,12 @@ 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);
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