Re: Kernel 2.6.22-rc3 breaks USB: Unable to get HID descriptor (errorsending control message: Operation not permitted)

[Justin Piszcz]

On Sun, 3 Jun 2007, Oliver Neukum wrote:

> Am Sonntag, 3. Juni 2007 12:36 schrieb Justin Piszcz:
> > On Sun, 3 Jun 2007, Jiri Kosina wrote:
> >
> > > On Sat, 2 Jun 2007, Justin Piszcz wrote:
>
> > > > failed to claim USB device, trying 2 more time(s)...
> > > > detaching kernel driver from USB device...
> > >
> > > Could you please provide strace outputs (or put it on the web somewhere if
> > > it's too big) for the failing and succeeding claiming of the device?
>
> static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
> {
> 	struct dev_state *ps = file->private_data;
> 	struct usb_device *dev = ps->dev;
> 	void __user *p = (void __user *)arg;
> 	int ret = -ENOTTY;
>
> 	if (!(file->f_mode & FMODE_WRITE))
> 		return -EPERM;
>
> That check fails as your application falls back to opening read only in
> case of insufficient permissions. Did you change some udev rules?
>
> 	Regards
> 		Oliver

Nope and just to verify that I made sure I tested this a couple times. 
Booted 2.6.21.3 no problems, then booted 2.6.23-rc3 w/out your patch, 
problem happens again.

Justin.
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