linux-kernel - Re: 2.6.29rc1 breakes usb: hiddev device no longer available

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Message-Id: <200901262005.08168.oliver@neukum.org>
Date:	Mon, 26 Jan 2009 20:05:07 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Folkert van Heusden <folkert@...heusden.com>,
	linux-input@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.29rc1 breakes usb: hiddev device no longer available

Am Monday 26 January 2009 19:27:07 schrieb Folkert van Heusden:
> > Since version 2.6.29rc1 querying cleware USb devices no longer works.
> > 2.6.28 works fine. 2.6.29-rc2 also no longer works.
> 

> the is the FAILURE situation (2.6.29-rc*):
> open("/dev/usb/hiddev0", O_RDWR)        = 3
> ioctl(3, HIDIOCGDEVINFO, 0xbf90c0d8)    = 0
> ioctl(3, HIDIOCAPPLICATION, 0)          = -6291455
> ioctl(3, HIDIOCGSTRING, 0x804e2c0)      = -1 ENODEV (No such device)

Please try this patch.

	Regards
		Oliver

--

--- linux-2.6/drivers/hid/usbhid/hiddev.c.alt	2009-01-26 20:03:10.000000000 +0100
+++ linux-2.6/drivers/hid/usbhid/hiddev.c	2009-01-26 20:03:17.000000000 +0100
@@ -656,7 +656,7 @@ static long hiddev_ioctl(struct file *fi
 
 	case HIDIOCGSTRING:
 		mutex_lock(&hiddev->existancelock);
-		if (!hiddev->exist)
+		if (hiddev->exist)
 			r = hiddev_ioctl_string(hiddev, cmd, user_arg);
 		else
 			r = -ENODEV;
--
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