linux-kernel - Re: [tpmdd-devel] [PATCH] tpm: fix rollback when adding char dev fails

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Date:	Tue, 2 Feb 2016 16:17:35 -0700
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:	Peter Huewe <peterhuewe@....de>, stable@...r.kernel.org,
	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [tpmdd-devel] [PATCH] tpm: fix rollback when adding char dev
 fails

On Fri, Jan 29, 2016 at 04:28:14PM -0800, Jarkko Sakkinen wrote:
> Fixed rollback and gave better names to the functions (more
> self-documenting, less confusing).
> 
> Fixes: d972b0523f ("tpm: fix call order in tpm-chip.c")
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> cc: stable@...r.kernel.org
>  drivers/char/tpm/tpm-chip.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
> index 45cc39a..1a9dcee 100644
> +++ b/drivers/char/tpm/tpm-chip.c
> @@ -140,7 +140,7 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
>  }
>  EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
>  
> -static int tpm_dev_add_device(struct tpm_chip *chip)
> +static int tpm_add_char_device(struct tpm_chip *chip)
>  {
>  	int rc;
>  
> @@ -151,7 +151,6 @@ static int tpm_dev_add_device(struct tpm_chip *chip)
>  			chip->devname, MAJOR(chip->dev.devt),
>  			MINOR(chip->dev.devt), rc);
>  
> -		device_unregister(&chip->dev);
>  		return rc;
>  	}
> @@ -162,13 +161,14 @@ static int tpm_dev_add_device(struct tpm_chip *chip)
>  			chip->devname, MAJOR(chip->dev.devt),
>  			MINOR(chip->dev.devt), rc);
>  
> +		cdev_del(&chip->cdev);
>  		return rc;

Yep.

Reviewed-By: Jason Gunthorpe <jgunthorpe@...idianresearch.com>

Jason