Re: [linux-usb-devel] usb sysfs intf files no longer created whenprobe fails

From: Stelian Pop
Date: Wed Jun 22 2005 - 13:35:59 EST

Le mercredi 22 juin 2005 à 12:03 -0400, Alan Stern a écrit :
> On Wed, 22 Jun 2005, Stelian Pop wrote:
> > Notice the '1-2:1.1' is missing. Upon booting I get:
> >
> > Jun 22 13:34:04 localhost kernel: HID device not claimed by input or hiddev
> > Jun 22 13:34:04 localhost kernel: usbhid: probe of 1-2:1.1 failed with error -5
> > Jun 22 13:34:04 localhost kernel: usb 1-2: device_add(1-2:1.1) --> -5

> You shouldn't call usb_create_sysfs_intf_files in any case.


> Your driver is returning -EIO from its probe routine according to the log,
> so it's not getting bound to the device.

Actually that's usbhid which returns -EIO.

> Hence there shouldn't be any
> attempt to unbind the device when your driver is removed. This is a bug
> in usbcore; it tries to delete all the interfaces without checking whether
> they were successfully added.

Since this is fixed by reverting the device_add patch, I'm wondering if
this isn't a driver model core bug, where it tries to device_remove all
the "devices" even if they weren't correctly added before...

But I haven't looked closely at the code, this is just a thought.

Stelian Pop <stelian@xxxxxxxxxx>

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