linux-kernel - Re: [PATCH] tpm: use devm_add_action_or

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Date:	Tue, 26 Apr 2016 11:30:14 +0300
From:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	Peter Huewe <peterhuewe@....de>,
	Marcel Selhorst <tpmdd@...horst.net>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	linux-kernel@...r.kernel.org, tpmdd-devel@...ts.sourceforge.net
Subject: Re: [PATCH] tpm: use devm_add_action_or_reset

On Mon, Apr 25, 2016 at 09:46:38PM +0100, Sudip Mukherjee wrote:
> If devm_add_action() fails we are explicitly calling the cleanup function
> in the error path. Lets use the helper function devm_add_action_or_reset()
> and return directly as we know the cleanup has been done by the helper.

Have you verified that this compiles against my tree?

/Jarkko

> Signed-off-by: Sudip Mukherjee <sudip.mukherjee@...ethink.co.uk>
> ---
>  drivers/char/tpm/tpm-chip.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
> index 5bc530c..aca4505 100644
> --- a/drivers/char/tpm/tpm-chip.c
> +++ b/drivers/char/tpm/tpm-chip.c
> @@ -212,11 +212,10 @@ struct tpm_chip *tpmm_chip_alloc(struct device *pdev,
>  	if (IS_ERR(chip))
>  		return chip;
>  
> -	rc = devm_add_action(pdev, (void (*)(void *)) put_device, &chip->dev);
> -	if (rc) {
> -		put_device(&chip->dev);
> +	rc = devm_add_action_or_reset(pdev, (void (*)(void *)) put_device,
> +				      &chip->dev);
> +	if (rc)
>  		return ERR_PTR(rc);
> -	}
>  
>  	dev_set_drvdata(pdev, chip);
>  
> -- 
> 1.9.1
>