Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Thu, 8 Sep 2022 14:04:12 +0300
From:   Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To:     matthew.gerlach@linux.intel.com
Cc:     hao.wu@intel.com, yilun.xu@intel.com, russell.h.weight@intel.com,
        basheer.ahmed.muddebihal@intel.com, trix@redhat.com,
        mdf@kernel.org, linux-fpga@vger.kernel.org,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        tianfei.zhang@intel.com, corbet@lwn.net,
        gregkh@linuxfoundation.org, linux-serial@vger.kernel.org,
        jirislaby@kernel.org, geert+renesas@glider.be,
        niklas.soderlund+renesas@ragnatech.se, phil.edworthy@renesas.com,
        macro@orcam.me.uk, johan@kernel.org, lukas@wunner.de
Subject: Re: [PATCH v1 4/5] fpga: dfl: add generic support for MSIX interrupts
Message-ID: <YxnMLI17XvjN74DW@smile.fi.intel.com>
References: <20220906190426.3139760-1-matthew.gerlach@linux.intel.com>
 <20220906190426.3139760-5-matthew.gerlach@linux.intel.com>
 <YxeqTdny7Nu7LzZo@smile.fi.intel.com>
 <alpine.DEB.2.22.394.2209071433320.3336870@rhweight-WRK1>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <alpine.DEB.2.22.394.2209071433320.3336870@rhweight-WRK1>
Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
Precedence: bulk

On Wed, Sep 07, 2022 at 02:37:32PM -0700, matthew.gerlach@linux.intel.com wrote:
> On Tue, 6 Sep 2022, Andy Shevchenko wrote:
> > On Tue, Sep 06, 2022 at 12:04:25PM -0700, matthew.gerlach@linux.intel.com wrote:

...

> > > +	if (fid != FEATURE_ID_AFU && fid != PORT_FEATURE_ID_ERROR &&
> > > +	    fid != PORT_FEATURE_ID_UINT && fid != FME_FEATURE_ID_GLOBAL_ERR) {
> > > +		v = readq(base);
> > > +		v = FIELD_GET(DFH_VERSION, v);
> > > +
> > > +		if (v == 1) {
> > > +			v =  readq(base + DFHv1_CSR_SIZE_GRP);
> > 
> > I am already lost what v keeps...
> > 
> > Perhaps
> > 
> > 		v = readq(base);
> > 		switch (FIELD_GET(DFH_VERSION, v)) {
> > 		case 1:
> > 			...
> > 			break;
> > 		}
> 
> How about?
> 		if (FIELD_GET(DFH_VERSION, readq(base)) == 1) {
> 			...
> 		}

This one tends to be expanded in the future, so I would keep it switch case.

-- 
With Best Regards,
Andy Shevchenko