Re: Error -28 from usb_submit_urb function.

Alan Stern <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]>
On Sun, 13 May 2007, Marek Brudka wrote:

> Hi,
> 
> I have a problem with my sn9c102 webcam. After some debugging with Luca
> Ricolia (see below),
> 
> Luca recognized that the problem comes from usb_submit_urb function, and
> probably was introduced recently

Um, what was the actual problem?  Is it the "Error -28" in your Subject 
line?

-28 is -ENOSPC (which explains the error message for your "cat" command).  
It means the driver is trying to overcommit the available bandwidth.  If
you build a kernel with CONFIG_USB_DEBUG turned on, you'll probably see
some warning messages in the dmesg log when the error occurs.

Alan Stern


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