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Date:   Wed, 19 Apr 2023 16:35:11 +0300 (EEST)
From:   =?ISO-8859-15?Q?Ilpo_J=E4rvinen?= <ilpo.jarvinen@linux.intel.com>
To:     Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
cc:     hdegoede@redhat.com, markgross@kernel.org,
        platform-driver-x86@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>,
        Zhang Rui <rui.zhang@intel.com>,
        Wendy Wang <wendy.wang@intel.com>
Subject: Re: [PATCH] platform/x86/intel-uncore-freq: Return error on write
 frequency
In-Reply-To: <20230418153230.679094-1-srinivas.pandruvada@linux.intel.com>
Message-ID: <64e98df-1663-1630-e2bf-5472aced5cac@linux.intel.com>
References: <20230418153230.679094-1-srinivas.pandruvada@linux.intel.com>
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On Tue, 18 Apr 2023, Srinivas Pandruvada wrote:

> Currently when the uncore_write() returns error, it is silently
> ignored. Return error to user space when uncore_write() fails.
> 
> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
> Reviewed-by: Zhang Rui <rui.zhang@intel.com>
> Tested-by: Wendy Wang <wendy.wang@intel.com>
> ---
> This patch has no dependency on TPMI patches for uncore support.
> 
>  .../x86/intel/uncore-frequency/uncore-frequency-common.c    | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c
> index cb24de9e97dc..fa8f14c925ec 100644
> --- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c
> +++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c
> @@ -44,14 +44,18 @@ static ssize_t store_min_max_freq_khz(struct uncore_data *data,
>  				      int min_max)
>  {
>  	unsigned int input;
> +	int ret;
>  
>  	if (kstrtouint(buf, 10, &input))
>  		return -EINVAL;
>  
>  	mutex_lock(&uncore_lock);
> -	uncore_write(data, input, min_max);
> +	ret = uncore_write(data, input, min_max);
>  	mutex_unlock(&uncore_lock);
>  
> +	if (ret)
> +		return ret;
> +
>  	return count;
>  }

Shouldn't this have Fixes tag?

Other than that,

Reviewed-by: Ilpo J?rvinen <ilpo.jarvinen@linux.intel.com>


-- 
 i.

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