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From: Greg KH <greg@kroah.com>
To: Dmitri Kassatkine <dmitri.kassatkine@nokia.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: usb.c patch -> successfuly read usb descriptors on some USB device
Date: Tue, 15 Jan 2002 10:38:14 -0800	[thread overview]
Message-ID: <20020115183814.GD27059@kroah.com> (raw)
In-Reply-To: <3C43FD9D.8050706@nokia.com>
In-Reply-To: <3C43FD9D.8050706@nokia.com>

On Tue, Jan 15, 2002 at 11:59:57AM +0200, Dmitri Kassatkine wrote:
> Hi,
> 
> Sometimes USB subsystem cannot get USB descriptor.
> 
> Jan 15 10:44:21 selma kernel: hub.c: USB new device connect on bus1/1, assigned device number 25
> Jan 15 10:44:21 selma kernel: usb.c: couldn't get all of config descriptors
> Jan 15 10:44:21 selma kernel: usb.c: unable to get device 25 configuration (error=-110)
> 
> Here is patch how to fix it for 2.4.17. It works for 2.4.16 as well.
> It necassary to read descriptor at once, not first 8 byte first.

Then this device does not match the USB spec.

> It works well now for NSM USB Bluetooth dongle.

Has this device gone through the USB certification process?  There are a
_lot_ of USB bluetooth devices out there that violate the USB spec, and
have not been certified.

thanks,

greg k-h

  reply	other threads:[~2002-01-15 18:42 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-01-15  9:59 usb.c patch -> successfuly read usb descriptors on some USB device Dmitri Kassatkine
2002-01-15 18:38 ` Greg KH [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-01-15  9:47 Dmitri Kassatkine

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