RE: [PATCH] usb: dwc3: correct default value of maxburst

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> -----Original Message-----
> From: Felipe Balbi [mailto:balbi@xxxxxx]
> Sent: Thursday, August 30, 2012 1:15 AM
> To: Chanho Park
> Cc: balbi@xxxxxx; linux-usb@xxxxxxxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx;
> Kyungmin Park
> Subject: Re: [PATCH] usb: dwc3: correct default value of maxburst
> 
> Hi,
> 
> On Wed, Aug 29, 2012 at 10:49:58AM +0900, Chanho Park wrote:
> > This patch changes default value of maxburst to 1. When a connection
> > is established to highspeed, the maxburst is set to 0. So, we need to
> > check and change default value of the maxburst before setting up burst
> size of ep.
> >
> > Signed-off-by: Chanho Park <chanho61.park@xxxxxxxxxxx>
> > Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> > ---
> >  drivers/usb/dwc3/gadget.c |    3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> > index 58fdfad..025a1bc 100644
> > --- a/drivers/usb/dwc3/gadget.c
> > +++ b/drivers/usb/dwc3/gadget.c
> > @@ -437,6 +437,9 @@ static int dwc3_gadget_set_ep_config(struct dwc3
> > *dwc, struct dwc3_ep *dep,
> >
> >  	memset(&params, 0x00, sizeof(params));
> >
> > +	if (!dep->endpoint.maxburst)
> > +		dep->endpoint.maxburst = 1;
> 
> a better patch would be to only check maxburst if endpoint is ss-capable. You
> can just check if comp_desc is a valid pointer (aka not NULL).

Thank you for your suggestion.
I'll change the check routine like below:

+       if (!comp_desc)
+               dep->endpoint.maxburst = 1;
+

Best regards,
Chanho Park

> 
> --
> balbi

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