[U-Boot] [PATCH 1/1] console: USB: KBD: Fix incorrect autoboot timeout

[Jim Lin]

On Wed, 2013-01-23 at 16:38 +0800, Wolfgang Denk wrote:
> Dear Jim Lin,
> 
> In message <1358923034-2727-1-git-send-email-jilin at nvidia.com> you wrote:
> > Autoboot timeout defined by CONFIG_BOOTDELAY will not be accurate if
> > CONFIG_USB_KEYBOARD and CONFIG_SYS_USB_EVENT_POLL are defined in
> > configuration file and when tstc() function for checking key pressed takes
> > longer time than 10 ms (e.g., 50 ms) to finish.
> ...
> 
> >  		/* delay 100 * 10ms */
> > -		for (i=0; !abort && i<100; ++i) {
> > +		j = 100;
> > +		for (i = 0; !abort && i < j; ++i) {
> > +			ts = get_timer(0);
> >  			if (tstc()) {	/* we got a key press	*/
> >  				abort  = 1;	/* don't auto boot	*/
> >  				bootdelay = 0;	/* no more delay	*/
> > @@ -263,7 +266,11 @@ int abortboot(int bootdelay)
> >  # endif
> >  				break;
> >  			}
> > -			udelay(10000);
> > +			ts = get_timer(ts);
> > +			if (ts < 10)
> > +				mdelay(10 - ts);
> > +			else
> > +				j = 1000 / (int) ts;
> >  		}
> 
> This is a pretty awkward implementation.  If you feel the current
> plain delay loop based approach is not exact enough, then please
> implement a real timeout - you are calling the timer anyway, so just
> use the timer values instead of a loop count.
> 
Thanks for pointing this out. I will improve it and resend.



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