netdev - Re: [PATCH net-next v7 2/9] i2c: designware: Add driver support for Wangxun 10Gb NIC

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Date: Wed, 10 May 2023 10:47:37 +0300
From: andy.shevchenko@...il.com
To: Jiawen Wu <jiawenwu@...stnetic.com>
Cc: 'Piotr Raczynski' <piotr.raczynski@...el.com>, netdev@...r.kernel.org,
	jarkko.nikula@...ux.intel.com, andriy.shevchenko@...ux.intel.com,
	mika.westerberg@...ux.intel.com, jsd@...ihalf.com,
	Jose.Abreu@...opsys.com, andrew@...n.ch, hkallweit1@...il.com,
	linux@...linux.org.uk, linux-i2c@...r.kernel.org,
	linux-gpio@...r.kernel.org, mengyuanlou@...-swift.com
Subject: Re: [PATCH net-next v7 2/9] i2c: designware: Add driver support for
 Wangxun 10Gb NIC

Wed, May 10, 2023 at 02:43:50PM +0800, Jiawen Wu kirjoitti:
> On Tuesday, May 9, 2023 9:52 PM, Piotr Raczynski wrote:
> > On Tue, May 09, 2023 at 10:27:27AM +0800, Jiawen Wu wrote:

...

> > >  	/*
> > > -	 * Initiate I2C message transfer when AMD NAVI GPU card is enabled,
> > > +	 * Initiate I2C message transfer when polling mode is enabled,
> > >  	 * As it is polling based transfer mechanism, which does not support
> > >  	 * interrupt based functionalities of existing DesignWare driver.
> > >  	 */
> > > -	if ((dev->flags & MODEL_MASK) == MODEL_AMD_NAVI_GPU) {
> > > +	switch (dev->flags & MODEL_MASK) {
> > > +	case MODEL_AMD_NAVI_GPU:
> > >  		ret = amd_i2c_dw_xfer_quirk(adap, msgs, num);
> > >  		goto done_nolock;
> > > +	case MODEL_WANGXUN_SP:
> > > +		ret = txgbe_i2c_dw_xfer_quirk(adap, msgs, num);
> > > +		goto done_nolock;
> > > +	default:
> > > +		break;
> > >  	}
> > Nit pick, when I first saw above code it looked a little weird,
> > maybe it would be a little clearer with:
> > 
> > 	if (i2c_dw_is_model_poll(dev)) {
> > 		switch (dev->flags & MODEL_MASK) {
> > 		case MODEL_AMD_NAVI_GPU:
> > 			ret = amd_i2c_dw_xfer_quirk(adap, msgs, num);
> > 			break;
> > 		case MODEL_WANGXUN_SP:
> > 			ret = txgbe_i2c_dw_xfer_quirk(adap, msgs, num);
> > 			break;
> > 		default:
> > 			break;
> > 		}
> > 		goto done_nolock;
> > 	}
> > 
> > I do not insist though.
> 
> Sure, it looks more obvious as polling mode quirk.

I don't think we need a double checks. The i2c_dw_is_model_poll() will repeat
the switch. Please, leave it as is in your current version.


-- 
With Best Regards,
Andy Shevchenko