[PATCH v3 1/6] mmc: zynq_sdhci: Resolve uninitialized return value

[Jaehoon Chung]

On 7/9/21 8:53 PM, Ashok Reddy Soma wrote:
> set_phase() functions are not modifying the ret value and returning
> the same uninitialized ret, return 0 instead.
> 
> Keep the return type as int to return errors when the tapdelay's are
> set via xilinx_pm_request() in future.
> 
> Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at xilinx.com>

Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>

Best Regards,
Jaehoon Chung

> ---
> 
> Changes in v3:
>  - Updated commmit description to explain why return type int is kept
>  - Change "@degree" to "@degrees:" in 5/6, so revert it in 1/6 from
>    sdhci_zynqmp_sampleclk_set_phase() and sdhci_versal_sdcardclk_set_phase()
> 
> Changes in v2:
>  - Changed "@degree" to "@degrees:" in function descriptions of tap
>    delay functions
> 
>  drivers/mmc/zynq_sdhci.c | 20 ++++++++------------
>  1 file changed, 8 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/mmc/zynq_sdhci.c b/drivers/mmc/zynq_sdhci.c
> index b79c4021b6..5bad5cb9e7 100644
> --- a/drivers/mmc/zynq_sdhci.c
> +++ b/drivers/mmc/zynq_sdhci.c
> @@ -183,7 +183,7 @@ static int arasan_sdhci_execute_tuning(struct mmc *mmc, u8 opcode)
>   *
>   * @host:		Pointer to the sdhci_host structure.
>   * @degrees:		The clock phase shift between 0 - 359.
> - * Return: 0 on success and error value on error
> + * Return: 0
>   */
>  static int sdhci_zynqmp_sdcardclk_set_phase(struct sdhci_host *host,
>  					    int degrees)
> @@ -191,7 +191,6 @@ static int sdhci_zynqmp_sdcardclk_set_phase(struct sdhci_host *host,
>  	struct arasan_sdhci_priv *priv = dev_get_priv(host->mmc->dev);
>  	struct mmc *mmc = (struct mmc *)host->mmc;
>  	u8 tap_delay, tap_max = 0;
> -	int ret;
>  	int timing = mode2timing[mmc->selected_mode];
>  
>  	/*
> @@ -229,7 +228,7 @@ static int sdhci_zynqmp_sdcardclk_set_phase(struct sdhci_host *host,
>  
>  	arasan_zynqmp_set_tapdelay(priv->deviceid, 0, tap_delay);
>  
> -	return ret;
> +	return 0;
>  }
>  
>  /**
> @@ -239,7 +238,7 @@ static int sdhci_zynqmp_sdcardclk_set_phase(struct sdhci_host *host,
>   *
>   * @host:		Pointer to the sdhci_host structure.
>   * @degrees:		The clock phase shift between 0 - 359.
> - * Return: 0 on success and error value on error
> + * Return: 0
>   */
>  static int sdhci_zynqmp_sampleclk_set_phase(struct sdhci_host *host,
>  					    int degrees)
> @@ -247,7 +246,6 @@ static int sdhci_zynqmp_sampleclk_set_phase(struct sdhci_host *host,
>  	struct arasan_sdhci_priv *priv = dev_get_priv(host->mmc->dev);
>  	struct mmc *mmc = (struct mmc *)host->mmc;
>  	u8 tap_delay, tap_max = 0;
> -	int ret;
>  	int timing = mode2timing[mmc->selected_mode];
>  
>  	/*
> @@ -285,7 +283,7 @@ static int sdhci_zynqmp_sampleclk_set_phase(struct sdhci_host *host,
>  
>  	arasan_zynqmp_set_tapdelay(priv->deviceid, tap_delay, 0);
>  
> -	return ret;
> +	return 0;
>  }
>  
>  /**
> @@ -295,14 +293,13 @@ static int sdhci_zynqmp_sampleclk_set_phase(struct sdhci_host *host,
>   *
>   * @host:		Pointer to the sdhci_host structure.
>   * @degrees		The clock phase shift between 0 - 359.
> - * Return: 0 on success and error value on error
> + * Return: 0
>   */
>  static int sdhci_versal_sdcardclk_set_phase(struct sdhci_host *host,
>  					    int degrees)
>  {
>  	struct mmc *mmc = (struct mmc *)host->mmc;
>  	u8 tap_delay, tap_max = 0;
> -	int ret;
>  	int timing = mode2timing[mmc->selected_mode];
>  
>  	/*
> @@ -349,7 +346,7 @@ static int sdhci_versal_sdcardclk_set_phase(struct sdhci_host *host,
>  		sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
>  	}
>  
> -	return ret;
> +	return 0;
>  }
>  
>  /**
> @@ -359,14 +356,13 @@ static int sdhci_versal_sdcardclk_set_phase(struct sdhci_host *host,
>   *
>   * @host:		Pointer to the sdhci_host structure.
>   * @degrees		The clock phase shift between 0 - 359.
> - * Return: 0 on success and error value on error
> + * Return: 0
>   */
>  static int sdhci_versal_sampleclk_set_phase(struct sdhci_host *host,
>  					    int degrees)
>  {
>  	struct mmc *mmc = (struct mmc *)host->mmc;
>  	u8 tap_delay, tap_max = 0;
> -	int ret;
>  	int timing = mode2timing[mmc->selected_mode];
>  
>  	/*
> @@ -417,7 +413,7 @@ static int sdhci_versal_sampleclk_set_phase(struct sdhci_host *host,
>  		sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
>  	}
>  
> -	return ret;
> +	return 0;
>  }
>  
>  static void arasan_sdhci_set_tapdelay(struct sdhci_host *host)
>