[tpmdd-devel,3/3] tpm: Get rid of devname

Now that we have a proper struct device just use dev_name() to
access this value instead of keeping two copies.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
---
 drivers/char/tpm/tpm-chip.c        | 17 +++++++++++------
 drivers/char/tpm/tpm.h             |  1 -
 drivers/char/tpm/tpm_eventlog.c    |  2 +-
 drivers/char/tpm/tpm_eventlog.h    |  2 +-
 drivers/char/tpm/tpm_i2c_nuvoton.c |  2 +-
 drivers/char/tpm/tpm_tis.c         |  2 +-
 6 files changed, 15 insertions(+), 11 deletions(-)

Hi Jason,

[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on v4.5-rc3 next-20160212]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Jason-Gunthorpe/tpm-Hold-the-kref-during-tpm_chip_find_get/20160213-080824
config: xtensa-allyesconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=xtensa 

All warnings (new ones prefixed by >>):

   drivers/char/tpm/tpm-chip.c: In function 'tpm1_chip_register':
>> drivers/char/tpm/tpm-chip.c:193:19: warning: passing argument 1 of 'tpm_bios_log_setup' discards 'const' qualifier from pointer target type
     chip->bios_dir = tpm_bios_log_setup(dev_name(&chip->dev));
                      ^
   In file included from drivers/char/tpm/tpm-chip.c:30:0:
   drivers/char/tpm/tpm_eventlog.h:83:31: note: expected 'char *' but argument is of type 'const char *'
    static inline struct dentry **tpm_bios_log_setup(char *name)
                                  ^

vim +193 drivers/char/tpm/tpm-chip.c

   177	{
   178		cdev_del(&chip->cdev);
   179		device_unregister(&chip->dev);
   180	}
   181	
   182	static int tpm1_chip_register(struct tpm_chip *chip)
   183	{
   184		int rc;
   185	
   186		if (chip->flags & TPM_CHIP_FLAG_TPM2)
   187			return 0;
   188	
   189		rc = tpm_sysfs_add_device(chip);
   190		if (rc)
   191			return rc;
   192	
 > 193		chip->bios_dir = tpm_bios_log_setup(dev_name(&chip->dev));
   194	
   195		return 0;
   196	}
   197	
   198	static void tpm1_chip_unregister(struct tpm_chip *chip)
   199	{
   200		if (chip->flags & TPM_CHIP_FLAG_TPM2)
   201			return;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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On Sat, Feb 13, 2016 at 09:01:06AM +0800, kbuild test robot wrote:

> url:    https://github.com/0day-ci/linux/commits/Jason-Gunthorpe/tpm-Hold-the-kref-during-tpm_chip_find_get/20160213-080824
> config: xtensa-allyesconfig (attached as .config)
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=xtensa 
> 
> All warnings (new ones prefixed by >>):
>
>    drivers/char/tpm/tpm-chip.c: In function 'tpm1_chip_register':
> >> drivers/char/tpm/tpm-chip.c:193:19: warning: passing argument 1 of 'tpm_bios_log_setup' discards 'const' qualifier from pointer target type
>      chip->bios_dir = tpm_bios_log_setup(dev_name(&chip->dev));
>                       ^
>    In file included from drivers/char/tpm/tpm-chip.c:30:0:
>    drivers/char/tpm/tpm_eventlog.h:83:31: note: expected 'char *' but argument is of type 'const char *'
>     static inline struct dentry **tpm_bios_log_setup(char *name)

Got it, thanks, didn't notice that kconfig variation.

Jason

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On Fri, Feb 12, 2016 at 05:04:31PM -0700, Jason Gunthorpe wrote:
> Now that we have a proper struct device just use dev_name() to
> access this value instead of keeping two copies.
> 
> Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>

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

/Jarkko

> ---
>  drivers/char/tpm/tpm-chip.c        | 17 +++++++++++------
>  drivers/char/tpm/tpm.h             |  1 -
>  drivers/char/tpm/tpm_eventlog.c    |  2 +-
>  drivers/char/tpm/tpm_eventlog.h    |  2 +-
>  drivers/char/tpm/tpm_i2c_nuvoton.c |  2 +-
>  drivers/char/tpm/tpm_tis.c         |  2 +-
>  6 files changed, 15 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
> index b1364bf62492..caa52a6110ec 100644
> --- a/drivers/char/tpm/tpm-chip.c
> +++ b/drivers/char/tpm/tpm-chip.c
> @@ -90,6 +90,7 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
>  				 const struct tpm_class_ops *ops)
>  {
>  	struct tpm_chip *chip;
> +	int err;
>  
>  	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
>  	if (chip == NULL)
> @@ -112,8 +113,6 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
>  
>  	set_bit(chip->dev_num, dev_mask);
>  
> -	scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
> -
>  	dev_set_drvdata(dev, chip);
>  
>  	chip->dev.class = tpm_class;
> @@ -128,7 +127,9 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
>  	else
>  		chip->dev.devt = MKDEV(MAJOR(tpm_devt), chip->dev_num);
>  
> -	dev_set_name(&chip->dev, "%s", chip->devname);
> +	err = dev_set_name(&chip->dev, "tpm%d", chip->dev_num);
> +	if (err)
> +		goto out;
>  
>  	device_initialize(&chip->dev);
>  
> @@ -137,6 +138,10 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
>  	chip->cdev.kobj.parent = &chip->dev.kobj;
>  
>  	return chip;
> +
> +out:
> +	put_device(&chip->dev);
> +	return ERR_PTR(err);
>  }
>  EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
>  
> @@ -148,7 +153,7 @@ static int tpm_dev_add_device(struct tpm_chip *chip)
>  	if (rc) {
>  		dev_err(&chip->dev,
>  			"unable to cdev_add() %s, major %d, minor %d, err=%d\n",
> -			chip->devname, MAJOR(chip->dev.devt),
> +			dev_name(&chip->dev), MAJOR(chip->dev.devt),
>  			MINOR(chip->dev.devt), rc);
>  
>  		device_unregister(&chip->dev);
> @@ -159,7 +164,7 @@ static int tpm_dev_add_device(struct tpm_chip *chip)
>  	if (rc) {
>  		dev_err(&chip->dev,
>  			"unable to device_register() %s, major %d, minor %d, err=%d\n",
> -			chip->devname, MAJOR(chip->dev.devt),
> +			dev_name(&chip->dev), MAJOR(chip->dev.devt),
>  			MINOR(chip->dev.devt), rc);
>  
>  		return rc;
> @@ -185,7 +190,7 @@ static int tpm1_chip_register(struct tpm_chip *chip)
>  	if (rc)
>  		return rc;
>  
> -	chip->bios_dir = tpm_bios_log_setup(chip->devname);
> +	chip->bios_dir = tpm_bios_log_setup(dev_name(&chip->dev));
>  
>  	return 0;
>  }
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 371f75f4d2a7..a53fc699027b 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -181,7 +181,6 @@ struct tpm_chip {
>  	unsigned int flags;
>  
>  	int dev_num;		/* /dev/tpm# */
> -	char devname[7];
>  	unsigned long is_open;	/* only one allowed */
>  	int time_expired;
>  
> diff --git a/drivers/char/tpm/tpm_eventlog.c b/drivers/char/tpm/tpm_eventlog.c
> index bd72fb04225e..49e50976efc8 100644
> --- a/drivers/char/tpm/tpm_eventlog.c
> +++ b/drivers/char/tpm/tpm_eventlog.c
> @@ -397,7 +397,7 @@ static int is_bad(void *p)
>  	return 0;
>  }
>  
> -struct dentry **tpm_bios_log_setup(char *name)
> +struct dentry **tpm_bios_log_setup(const char *name)
>  {
>  	struct dentry **ret = NULL, *tpm_dir, *bin_file, *ascii_file;
>  
> diff --git a/drivers/char/tpm/tpm_eventlog.h b/drivers/char/tpm/tpm_eventlog.h
> index 267bfbd1b7bb..f072a1a1d5cc 100644
> --- a/drivers/char/tpm/tpm_eventlog.h
> +++ b/drivers/char/tpm/tpm_eventlog.h
> @@ -77,7 +77,7 @@ int read_log(struct tpm_bios_log *log);
>  
>  #if defined(CONFIG_TCG_IBMVTPM) || defined(CONFIG_TCG_IBMVTPM_MODULE) || \
>  	defined(CONFIG_ACPI)
> -extern struct dentry **tpm_bios_log_setup(char *);
> +extern struct dentry **tpm_bios_log_setup(const char *name);
>  extern void tpm_bios_log_teardown(struct dentry **);
>  #else
>  static inline struct dentry **tpm_bios_log_setup(char *name)
> diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
> index 8fb378f502e4..6dd74d114fb3 100644
> --- a/drivers/char/tpm/tpm_i2c_nuvoton.c
> +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
> @@ -560,7 +560,7 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
>  		rc = devm_request_irq(dev, chip->vendor.irq,
>  				      i2c_nuvoton_int_handler,
>  				      IRQF_TRIGGER_LOW,
> -				      chip->devname,
> +				      dev_name(&chip->dev),
>  				      chip);
>  		if (rc) {
>  			dev_err(dev, "%s() Unable to request irq: %d for use\n",
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index f15466b7fb78..0cd57371b755 100644
> --- a/drivers/char/tpm/tpm_tis.c
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -610,7 +610,7 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
>  	u8 original_int_vec;
>  
>  	if (devm_request_irq(chip->dev.parent, irq, tis_int_handler, flags,
> -			     chip->devname, chip) != 0) {
> +			     dev_name(&chip->dev), chip) != 0) {
>  		dev_info(&chip->dev, "Unable to request irq: %d for probe\n",
>  			 irq);
>  		return -1;
> -- 
> 2.1.4
> 

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