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Subject: Re: [PATCH] MFD: intel_pmt: Fix nuisance messages and handling of
 disabled capabilities
To:     "David E. Box" <david.e.box@linux.intel.com>, lee.jones@linaro.org
Cc:     linux-kernel@vger.kernel.org
References: <20210128172846.99352-1-david.e.box@linux.intel.com>
From:   Hans de Goede <hdegoede@redhat.com>
Message-ID: <32c18a6f-a1d9-243f-88e6-7a98b1299d87@redhat.com>
Date:   Tue, 2 Feb 2021 15:22:06 +0100
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Hi,

On 1/28/21 6:28 PM, David E. Box wrote:
> Some products will be available that have PMT capabilities that are not
> supported. Remove the warnings in this instance to avoid nuisance messages
> and confusion.
> 
> Also return an error code for capabilities that are disabled by quirk to
> prevent them from keeping the driver loaded if only disabled capabilities
> are found.
> 
> Fixes: 4f8217d5b0ca ("mfd: Intel Platform Monitoring Technology support")
> Signed-off-by: David E. Box <david.e.box@linux.intel.com>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@redhat.com>

Regards,

Hans


> ---
>  drivers/mfd/intel_pmt.c | 11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/mfd/intel_pmt.c b/drivers/mfd/intel_pmt.c
> index 744b230cdcca..65da2b17a204 100644
> --- a/drivers/mfd/intel_pmt.c
> +++ b/drivers/mfd/intel_pmt.c
> @@ -79,19 +79,18 @@ static int pmt_add_dev(struct pci_dev *pdev, struct intel_dvsec_header *header,
>  	case DVSEC_INTEL_ID_WATCHER:
>  		if (quirks & PMT_QUIRK_NO_WATCHER) {
>  			dev_info(dev, "Watcher not supported\n");
> -			return 0;
> +			return -EINVAL;
>  		}
>  		name = "pmt_watcher";
>  		break;
>  	case DVSEC_INTEL_ID_CRASHLOG:
>  		if (quirks & PMT_QUIRK_NO_CRASHLOG) {
>  			dev_info(dev, "Crashlog not supported\n");
> -			return 0;
> +			return -EINVAL;
>  		}
>  		name = "pmt_crashlog";
>  		break;
>  	default:
> -		dev_err(dev, "Unrecognized PMT capability: %d\n", id);
>  		return -EINVAL;
>  	}
>  
> @@ -174,12 +173,8 @@ static int pmt_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>  		header.offset = INTEL_DVSEC_TABLE_OFFSET(table);
>  
>  		ret = pmt_add_dev(pdev, &header, quirks);
> -		if (ret) {
> -			dev_warn(&pdev->dev,
> -				 "Failed to add device for DVSEC id %d\n",
> -				 header.id);
> +		if (ret)
>  			continue;
> -		}
>  
>  		found_devices = true;
>  	} while (true);
>