linux-kernel - Re: [PATCH] char/tpm: Fix compile error if CONFIG_PM is not set in tpm_i2c

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Date:	Fri, 3 Aug 2012 15:38:36 -0500
From:	Kent Yoder <key@...ux.vnet.ibm.com>
To:	Peter Huewe <peter.huewe@...ineon.com>
Cc:	James Morris <jmorris@...ei.org>, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	tpmdd-devel@...ts.sourceforge.net,
	Bryan Freed <bfreed@...omium.org>,
	David Safford <safford@...ux.vnet.ibm.com>, hpa@...ux.intel.com
Subject: Re: [PATCH] char/tpm: Fix compile error if CONFIG_PM is not set in
 tpm_i2c_infineon

Hi Peter,

On Fri, Aug 03, 2012 at 04:51:16PM +0200, Peter Huewe wrote:
> If CONFIG_PM was not set the compiler aborted with the following message:
> tpm_i2c_infineon.c:740:12: error: lvalue required as unary '&' operand
> 
> This patch fixes this error by not defining tpm_tis_i2c_ops as NULL if
> CONFIG_PM is not set, but only setting the suspend and resume function
> pointer as NULL

  Lets try to sync up with the work Rafael Wysocki is doing for PM.
Please take a look at these commits:

035e2ce8eb7412dbcb8522c19676a1dd52f3c024
8324be05380be044df8b70cb4bfb0c0b50eec3e5

Thanks,
Kent

> Signed-off-by: Peter Huewe <peter.huewe@...ineon.com>
> ---
> Sorry for the inconvenience - now tested with and without CONFIG_PM. Sorry.
> 
>  drivers/char/tpm/tpm_i2c_infineon.c |    9 ++++-----
>  1 files changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
> index 1794a09..114e1a1 100644
> --- a/drivers/char/tpm/tpm_i2c_infineon.c
> +++ b/drivers/char/tpm/tpm_i2c_infineon.c
> @@ -674,16 +674,15 @@ static int tpm_tis_i2c_resume(struct device *dev)
>  {
>  	return tpm_pm_resume(dev);
>  }
> +#else
> +#define tpm_tis_i2c_suspend NULL
> +#define tpm_tis_i2c_resume NULL
> +#endif
> 
>  static const struct dev_pm_ops tpm_tis_i2c_ops = {
>  	.suspend = tpm_tis_i2c_suspend,
>  	.resume = tpm_tis_i2c_resume,
>  };
> -#else
> -#define tpm_tis_i2c_suspend NULL
> -#define tpm_tis_i2c_resume NULL
> -#define tpm_tis_i2c_ops NULL
> -#endif
> 
>  static int __devinit tpm_tis_i2c_probe(struct i2c_client *client,
>  			     const struct i2c_device_id *id)
> -- 
> 1.7.6.msysgit.0
> 

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