Re: EOVERFLOW problem with usb_control_msg

Alan Stern <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]>
On Mon, 20 Aug 2007, Frank A. Kingswood wrote:

> Alan Stern wrote:
> > It looks like your driver thinks it is performing a control-IN 
> > transfer, but the usbmon log shows that it is really doing a 
> > control-OUT.  Could that be your problem?  It stems from the fact that 
> > ch341_control_in uses usb_sndctrlpipe() instead of usb_rcvctrlpipe().
> 
> Of course, you're right. With that change in my code now runs OK.
> 
> Next will be set_termios, but that looks pretty hairy in the drivers 
> I've looked at...

Some of those drivers have been going through changes recently to 
simplify the termios handling.  Be sure to look at the current 
development versions.

> When my driver is feature-complete, should I post it here first for 
> review, or to lkml?

Post it here first.

Alan Stern


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