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

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Message-ID: <0d4e8a8130e6a78ba3b6fcb3aee9858d22e5c23b.camel@linux.intel.com>
Date:   Thu, 30 Jul 2020 10:53:55 -0700
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     Mark D Rustad <mrustad@...il.com>, Lee Jones <lee.jones@...aro.org>
Cc:     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, 2020-07-29 at 15:59 -0700, 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.

Already done in V5. Thanks.

David