linux-kernel - Re: [PATCH v5 05/17] tpm: print tpm2_commit_space() error inside tpm2_commit

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Message-Id: <32b1c364-2231-a740-8dbb-3cbbff490aca@linux.ibm.com>
Date:   Thu, 8 Nov 2018 09:56:34 -0500
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        linux-integrity@...r.kernel.org
Cc:     linux-security-module@...r.kernel.org,
        James Bottomley <James.Bottomley@...senPartnership.com>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Tadeusz Struk <tadeusz.struk@...el.com>,
        Stefan Berger <stefanb@...ux.vnet.ibm.com>,
        Nayna Jain <nayna@...ux.ibm.com>,
        Peter Huewe <peterhuewe@....de>,
        Jason Gunthorpe <jgg@...pe.ca>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 05/17] tpm: print tpm2_commit_space() error inside
 tpm2_commit_space()

On 11/8/18 9:15 AM, Jarkko Sakkinen wrote:
> The error logging for tpm2_commit_space() is in a wrong place. This
> commit moves it inside that function.
>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>

Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>


> ---
>   drivers/char/tpm/tpm-interface.c | 8 ++------
>   drivers/char/tpm/tpm2-space.c    | 9 ++++++---
>   2 files changed, 8 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> index c9efd1b9fd2c..7ffb16edab6f 100644
> --- a/drivers/char/tpm/tpm-interface.c
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -268,14 +268,10 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
>   		rc = -EFAULT;
>
>   out_space:
> -	if (rc) {
> +	if (rc)
>   		tpm2_flush_space(chip);
> -	} else {
> +	else
>   		rc = tpm2_commit_space(chip, space, ordinal, buf, &len);
> -		if (rc)
> -			dev_err(&chip->dev, "tpm2_commit_space: error %d\n",
> -				rc);
> -	}
>
>   out_idle:
>   	/* may fail but do not override previous error value in rc */
> diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c
> index d53c882268ff..3d5f9577e5de 100644
> --- a/drivers/char/tpm/tpm2-space.c
> +++ b/drivers/char/tpm/tpm2-space.c
> @@ -501,19 +501,19 @@ int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space,
>   	rc = tpm2_map_response_header(chip, cc, buf, *bufsiz);
>   	if (rc) {
>   		tpm2_flush_space(chip);
> -		return rc;
> +		goto out;
>   	}
>
>   	rc = tpm2_map_response_body(chip, cc, buf, *bufsiz);
>   	if (rc) {
>   		tpm2_flush_space(chip);
> -		return rc;
> +		goto out;
>   	}
>
>   	rc = tpm2_save_space(chip);
>   	if (rc) {
>   		tpm2_flush_space(chip);
> -		return rc;
> +		goto out;
>   	}
>
>   	*bufsiz = be32_to_cpu(header->length);
> @@ -526,4 +526,7 @@ int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space,
>   	memcpy(space->session_buf, chip->work_space.session_buf, PAGE_SIZE);
>
>   	return 0;
> +out:
> +	dev_err(&chip->dev, "%s: error %d\n", __func__, rc);
> +	return rc;
>   }