linux-kernel - Re: [PATCH V4 2/3] mfd: Intel Platform Monitoring Technology support

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Date:   Fri, 31 Jul 2020 07:19:19 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Mark D Rustad <mrustad@...il.com>
Cc:     "David E. Box" <david.e.box@...ux.intel.com>, dvhart@...radead.org,
        andy@...radead.org, bhelgaas@...gle.com,
        alexander.h.duyck@...ux.intel.com,
        linux-kernel <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org, linux-pci@...r.kernel.org,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: Re: [PATCH V4 2/3] mfd: Intel Platform Monitoring Technology support

On Wed, 29 Jul 2020, Mark D Rustad wrote:

> at 12:58 AM, Lee Jones <lee.jones@...aro.org> wrote:
> 
> > If you do:
> > 
> > 	do {
> > 		int pos;
> > 
> > 		pos = pci_find_next_ext_capability(pdev, pos, PCI_EXT_CAP_ID_DVSEC);
> > 		if (!pos)
> > 			break;
> > 
> > Then you can invoke pci_find_next_ext_capability() once, no?
> 
> Part of your suggestion here won't work, because pos needs to be initialized
> to 0 the first time. As such it needs to be declared and initialized outside
> the loop. Other than that it may be ok.

Right.  It was just an example I quickly hacked out.

Feel free to move the variable, or make it static, etc.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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