Re: urb status EOVERFLOW

David Brownell <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]>
On Thursday 05 July 2007, Alan Stern wrote:
> On Wed, 4 Jul 2007, Jon Smirl wrote:
> 
> > I'm working on the Ralink rt2x00usb driver. It is getting stuck in a
> > state where the receive urb is returning -75, EOVERFLOW. It promptly
> > ignores the error and resubmits the urb. Which comes back again with
> > EOVERFLOW. What does this error mean and how should it be handled?
> 
> For debugging purposes, you can try changing all your IN transfers to
> be a multiple of the maxpacket length -- round up transfers that aren't
> evenly divisible.  That will at least prevent EOVERFLOW from occurring,
> giving you a chance to use usbmon and printk to find out what's really
> going on.

In fact that's a good policy overall.

- Dave


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