linux-kernel - Re: [PATCH] char: tpm: remove unnecessary NULL check

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Date:   Wed, 14 Jun 2017 11:46:09 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Cc:     Peter Huewe <peterhuewe@....de>,
        Marcel Selhorst <tpmdd@...horst.net>,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] char: tpm: remove unnecessary NULL check

On Tue, Jun 13, 2017 at 02:55:42PM -0500, Gustavo A. R. Silva wrote:
> Remove unnecessary NULL check.
> Pointer _chip_ cannot be NULL in this instance.
> 
> Addresses-Coverity-ID: 1397646
> Cc: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> ---
>  drivers/char/tpm/tpm_atmel.c | 12 +++++-------
>  1 file changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
> index 0d322ab..66a1452 100644
> --- a/drivers/char/tpm/tpm_atmel.c
> +++ b/drivers/char/tpm/tpm_atmel.c
> @@ -144,13 +144,11 @@ static void atml_plat_remove(void)
>  	struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
>  	struct tpm_atmel_priv *priv = dev_get_drvdata(&chip->dev);
>  
> -	if (chip) {
> -		tpm_chip_unregister(chip);
> -		if (priv->have_region)
> -			atmel_release_region(priv->base, priv->region_size);
> -		atmel_put_base_addr(priv->iobase);
> -		platform_device_unregister(pdev);
> -	}
> +	tpm_chip_unregister(chip);
> +	if (priv->have_region)
> +		atmel_release_region(priv->base, priv->region_size);
> +	atmel_put_base_addr(priv->iobase);
> +	platform_device_unregister(pdev);
>  }
>  
>  static SIMPLE_DEV_PM_OPS(tpm_atml_pm, tpm_pm_suspend, tpm_pm_resume);
> -- 
> 2.5.0
> 

Thank you.

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>

/Jarkko