Re: [PATCH 1/6] usb: add reset endpoint operations

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On Tue, 7 Apr 2009, Greg KH wrote:

> On Tue, Apr 07, 2009 at 05:31:55PM +0000, David Vrabel wrote:
> > Wireless USB endpoint state has a sequence number and a current
> > window and not just a single toggle bit.  So allow HCDs to provide a
> > endpoint_reset method and call this or clear the software toggles as
> > required (after a clear halt).
> > 
> > usb_settoggle() and friends are then HCD internal and are moved into
> > core/hcd.h.
> 
> You remove this api, yet the pvrusb2 driver used it, and you don't seem
> to have resolved the issue where it was calling it:
> 
> > diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
> > index fa304e5..b86682d 100644
> > --- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
> > +++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
> > @@ -1418,7 +1418,6 @@ static int pvr2_upload_firmware1(struct pvr2_hdw *hdw)
> >  		return ret;
> >  	}
> >  
> > -	usb_settoggle(hdw->usb_dev, 0 & 0xf, !(0 & USB_DIR_IN), 0);
> >  	usb_clear_halt(hdw->usb_dev, usb_sndbulkpipe(hdw->usb_dev, 0 & 0x7f));
> >  
> >  	pipe = usb_sndctrlpipe(hdw->usb_dev, 0);
> 
> Should usb_reset_endpoint() be called here instead?
> 

Speaking as the maintainer of that driver, I'm OK with accepting this 
as-is for now.  This is a sequence that should not interfere with normal 
driver operation.  I will look at this further a little later (not 
likely before the merge window closes) and if this change turns out to 
cause a problem I'll make a follow-up fix upstream.

Acked-By: Mike Isely <isely@xxxxxxxxx>

  -Mike

-- 

Mike Isely
isely @ pobox (dot) com
PGP: 03 54 43 4D 75 E5 CC 92 71 16 01 E2 B5 F5 C1 E8
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