From: Oliver Neukum <oneukum@suse.de>
To: Justin Piszcz <jpiszcz@lucidpixels.com>,
linux-usb-devel@lists.sourceforge.net
Cc: Jiri Kosina <jikos@jikos.cz>, linux-kernel@vger.kernel.org
Subject: Re: Kernel 2.6.22-rc3 breaks USB: Unable to get HID descriptor (error sending control message: Operation not permitted)
Date: Sun, 3 Jun 2007 12:54:51 +0200 [thread overview]
Message-ID: <200706031254.52434.oneukum@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.0706030634400.3574@p34.internal.lan>
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
next prev parent reply other threads:[~2007-06-03 12:28 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-02 22:43 Kernel 2.6.22-rc3 breaks USB: Unable to get HID descriptor (error sending control message: Operation not permitted) Justin Piszcz
2007-06-03 9:49 ` Jiri Kosina
2007-06-03 10:36 ` Justin Piszcz
2007-06-03 10:54 ` Oliver Neukum [this message]
2007-06-03 12:29 ` Justin Piszcz
2007-06-03 11:00 ` Jiri Kosina
2007-06-03 11:16 ` Justin Piszcz
2007-06-03 11:22 ` Jiri Kosina
2007-06-03 11:52 ` Justin Piszcz
2007-06-03 12:35 ` Kay Sievers
2007-06-03 12:40 ` Justin Piszcz
2007-06-03 12:44 ` Justin Piszcz
2007-06-03 16:51 ` Kay Sievers
2007-06-03 9:55 ` Jiri Kosina
2007-06-03 10:48 ` [linux-usb-devel] " Oliver Neukum
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