Re: [PATCH] usb: usb251xb: check if hub is already attached

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On Thu, Feb 27, 2020 at 09:41:33AM +0100, Uwe Kleine-König wrote:
> Hello,
> 
> On Thu, Feb 27, 2020 at 09:30:07AM +0100, Richard Leitner wrote:
> > On Thu, Feb 27, 2020 at 09:14:48AM +0100, Uwe Kleine-König wrote:
> > > If you write this as:
> > > 
> > > 	if (!hub->gpio_reset && usb251xb_hub_attached(hub))
> > > 		return 0;
> > > 
> > > you save some i2c transfers in the presence of a reset gpio.
> > 
> > I'd also go with this solution, so you only have i2c transfers when a
> > reset gpio is configured/present.
> 
> Nitpick: you only have additional i2c transfers if *no* reset gpio is
> configured/present.

Sure... That "no" got lost somewhere between my brain and the keyboard ;-)

regards;rl

> 
> Best regards
> Uwe
> 
> -- 
> Pengutronix e.K.                           | Uwe Kleine-König            |
> Industrial Linux Solutions                 | https://www.pengutronix.de/ |



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