linux-kernel - Re: [PATCH 1/3] mfd: intel

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Date:   Thu, 1 Oct 2020 08:55:07 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     "David E. Box" <david.e.box@...ux.intel.com>
Cc:     hdegoede@...hat.com, andriy.shevchenko@...ux.intel.com,
        dvhart@...radead.org, andy@...radead.org,
        alexander.h.duyck@...ux.intel.com, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH 1/3] mfd: intel_pmt: Add OOBMSM device ID

On Wed, 30 Sep 2020, David E. Box wrote:

> On Wed, 2020-09-30 at 08:12 +0100, Lee Jones wrote:
> > On Tue, 29 Sep 2020, David E. Box wrote:
> > 
> > > On Tue, 2020-09-29 at 10:51 +0100, Lee Jones wrote:
> > > > On Fri, 11 Sep 2020, David E. Box wrote:
> > > > 
> > > > > Add Out of Band Management Services Module device ID to Intel
> > > > > PMT
> > > > > driver.
> > > > > 
> > > > > Signed-off-by: Alexander Duyck <
> > > > > alexander.h.duyck@...ux.intel.com>
> > > > > Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> > > > > ---
> > > > >  drivers/mfd/intel_pmt.c | 4 ++++
> > > > >  1 file changed, 4 insertions(+)
> > > > > 
> > > > > diff --git a/drivers/mfd/intel_pmt.c b/drivers/mfd/intel_pmt.c
> > > > > index 0e572b105101..8f9970ab3026 100644
> > > > > --- a/drivers/mfd/intel_pmt.c
> > > > > +++ b/drivers/mfd/intel_pmt.c
> > > > > @@ -55,6 +55,8 @@ struct pmt_platform_info {
> > > > >  	unsigned long quirks;
> > > > >  };
> > > > >  
> > > > > +static const struct pmt_platform_info pmt_info;
> > > > > +
> > > > >  static const struct pmt_platform_info tgl_info = {
> > > > >  	.quirks = PMT_QUIRK_NO_WATCHER | PMT_QUIRK_NO_CRASHLOG
> > > > > |
> > > > >  		  PMT_QUIRK_TABLE_SHIFT,
> > > > > @@ -200,8 +202,10 @@ static void pmt_pci_remove(struct pci_dev
> > > > > *pdev)
> > > > >  	pm_runtime_get_sync(&pdev->dev);
> > > > >  }
> > > > >  
> > > > > +#define PCI_DEVICE_ID_INTEL_PMT_OOBMSM	0x09a7
> > > > >  #define PCI_DEVICE_ID_INTEL_PMT_TGL	0x9a0d
> > > > >  static const struct pci_device_id pmt_pci_ids[] = {
> > > > > +	{ PCI_DEVICE_DATA(INTEL, PMT_OOBMSM, &pmt_info) },
> > > > 
> > > > Why are you supplying an empty struct?
> > > 
> > > Because the OOBMSM device doesn't need code provided driver data,
> > > but
> > > info is dereferenced in several areas. We also use kmemdup to copy
> > > driver_data under the assumption that it was provided. We could
> > > allow
> > > for NULL if driver_data is referenced directly.
> > 
> > Just check for NULL.  No need to create and send bogus data.
> 
> Sure. If you haven't already, please note that this patch was pulled
> into the V6 series in the link below. You accepted V5 but Hans
> suggested some late changes after reviewing the new crashlog driver in
> this patchset. So rather than have separate patchsets with a
> dependency, we bundled them all into the original. We'll make these
> changes in V7 now.
> 
> https://lore.kernel.org/patchwork/patch/1313166/

Sounds reasonable. 

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