linux-kernel - Re: [PATCH V3 02/16] platform/x86/intel/vsec: remove platform

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Message-ID: <1c56cbb-5745-5d50-fdc0-ceb9a4f1dab0@linux.intel.com>
Date:   Thu, 12 Oct 2023 18:31:47 +0300 (EEST)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     "David E. Box" <david.e.box@...ux.intel.com>
cc:     LKML <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org, rajvi.jingar@...ux.intel.com
Subject: Re: [PATCH V3 02/16] platform/x86/intel/vsec: remove platform_info
 from vsec device structure

On Wed, 11 Oct 2023, David E. Box wrote:

> In preparation for exporting an API to register Intel Vendor Specific
> Extended Capabilities (VSEC) from other drivers, remove the pointer to
> platform_info from intel_vsec_device. This prevents a potential page fault
> when auxiliary drivers probe and attempt to dereference this pointer to
> access the needed quirks field. Instead, just add the quirks to
> intel_vsec_device.
> 
> Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> ---
> V3 - No change
> 
> V2 - New patch splitting previous PATCH 1
> 
>  drivers/platform/x86/intel/pmt/class.c | 2 +-
>  drivers/platform/x86/intel/vsec.c      | 2 +-
>  drivers/platform/x86/intel/vsec.h      | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c
> index f32a233470de..2ad91d2fd954 100644
> --- a/drivers/platform/x86/intel/pmt/class.c
> +++ b/drivers/platform/x86/intel/pmt/class.c
> @@ -31,7 +31,7 @@ bool intel_pmt_is_early_client_hw(struct device *dev)
>  	 * differences from the server platforms (which use the Out Of Band
>  	 * Management Services Module OOBMSM).
>  	 */
> -	return !!(ivdev->info->quirks & VSEC_QUIRK_EARLY_HW);
> +	return !!(ivdev->quirks & VSEC_QUIRK_EARLY_HW);
>  }
>  EXPORT_SYMBOL_NS_GPL(intel_pmt_is_early_client_hw, INTEL_PMT);
>  
> diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c
> index 6bb233a23414..15866b7d3117 100644
> --- a/drivers/platform/x86/intel/vsec.c
> +++ b/drivers/platform/x86/intel/vsec.c
> @@ -201,7 +201,7 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
>  	intel_vsec_dev->pcidev = pdev;
>  	intel_vsec_dev->resource = res;
>  	intel_vsec_dev->num_resources = header->num_entries;
> -	intel_vsec_dev->info = info;
> +	intel_vsec_dev->quirks = info->quirks;
>  
>  	if (header->id == VSEC_ID_SDSI)
>  		intel_vsec_dev->ida = &intel_vsec_sdsi_ida;
> diff --git a/drivers/platform/x86/intel/vsec.h b/drivers/platform/x86/intel/vsec.h
> index c242c07ea69c..8b9fad170503 100644
> --- a/drivers/platform/x86/intel/vsec.h
> +++ b/drivers/platform/x86/intel/vsec.h
> @@ -79,11 +79,11 @@ struct intel_vsec_device {
>  	struct pci_dev *pcidev;
>  	struct resource *resource;
>  	struct ida *ida;
> -	struct intel_vsec_platform_info *info;
>  	int num_resources;
>  	int id; /* xa */

What is this based on??

Unfortunately, I couldn't review some of your later patches efficiently 
because this patch failed to apply.

-- 
 i.