Re: [PATCH 2/2] crypto: ccp - Fail the PSP initialization when writing psp data file failed

[kernel test robot <lkp@intel.com>]

Hi Jacky,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on herbert-cryptodev-2.6/master]
[also build test WARNING on herbert-crypto-2.6/master kvm/queue linus/master v5.19 next-20220802]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jacky-Li/Improve-error-handling-during-INIT_EX-file-initialization/20220803-025617
base:   https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
config: x86_64-rhel-8.3-kselftests (https://download.01.org/0day-ci/archive/20220803/202208031012.z1rYKkYA-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/3c3fe5b1821e961cbfe1f3724a5256e6e04bbe92
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jacky-Li/Improve-error-handling-during-INIT_EX-file-initialization/20220803-025617
        git checkout 3c3fe5b1821e961cbfe1f3724a5256e6e04bbe92
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/crypto/ccp/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from include/linux/device.h:15,
                    from drivers/crypto/ccp/psp-dev.h:13,
                    from drivers/crypto/ccp/sev-dev.c:30:
   drivers/crypto/ccp/sev-dev.c: In function 'sev_write_init_ex_file':
>> drivers/crypto/ccp/sev-dev.c:252:25: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int' [-Wformat=]
     252 |                         "SEV: could not open file for write, error %ld\n",
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:110:30: note: in definition of macro 'dev_printk_index_wrap'
     110 |                 _p_func(dev, fmt, ##__VA_ARGS__);                       \
         |                              ^~~
   include/linux/dev_printk.h:144:56: note: in expansion of macro 'dev_fmt'
     144 |         dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                                                        ^~~~~~~
   drivers/crypto/ccp/sev-dev.c:251:17: note: in expansion of macro 'dev_err'
     251 |                 dev_err(sev->dev,
         |                 ^~~~~~~
   drivers/crypto/ccp/sev-dev.c:252:70: note: format string is defined here
     252 |                         "SEV: could not open file for write, error %ld\n",
         |                                                                    ~~^
         |                                                                      |
         |                                                                      long int
         |                                                                    %d


vim +252 drivers/crypto/ccp/sev-dev.c

3d725965f836a7a David Rientjes 2021-12-07  235  
3c3fe5b1821e961 Jacky Li       2022-08-02  236  static int sev_write_init_ex_file(void)
3d725965f836a7a David Rientjes 2021-12-07  237  {
3d725965f836a7a David Rientjes 2021-12-07  238  	struct sev_device *sev = psp_master->sev_data;
3d725965f836a7a David Rientjes 2021-12-07  239  	struct file *fp;
3d725965f836a7a David Rientjes 2021-12-07  240  	loff_t offset = 0;
3d725965f836a7a David Rientjes 2021-12-07  241  	ssize_t nwrite;
3d725965f836a7a David Rientjes 2021-12-07  242  
3d725965f836a7a David Rientjes 2021-12-07  243  	lockdep_assert_held(&sev_cmd_mutex);
3d725965f836a7a David Rientjes 2021-12-07  244  
3d725965f836a7a David Rientjes 2021-12-07  245  	if (!sev_init_ex_buffer)
3c3fe5b1821e961 Jacky Li       2022-08-02  246  		return 0;
3d725965f836a7a David Rientjes 2021-12-07  247  
05def5cacfa0bd5 Jacky Li       2022-04-14  248  	fp = open_file_as_root(init_ex_path, O_CREAT | O_WRONLY, 0600);
3d725965f836a7a David Rientjes 2021-12-07  249  	if (IS_ERR(fp)) {
3c3fe5b1821e961 Jacky Li       2022-08-02  250  		int ret = PTR_ERR(fp);
3d725965f836a7a David Rientjes 2021-12-07  251  		dev_err(sev->dev,
3d725965f836a7a David Rientjes 2021-12-07 @252  			"SEV: could not open file for write, error %ld\n",
3c3fe5b1821e961 Jacky Li       2022-08-02  253  			ret);
3c3fe5b1821e961 Jacky Li       2022-08-02  254  		return ret;
3d725965f836a7a David Rientjes 2021-12-07  255  	}
3d725965f836a7a David Rientjes 2021-12-07  256  
3d725965f836a7a David Rientjes 2021-12-07  257  	nwrite = kernel_write(fp, sev_init_ex_buffer, NV_LENGTH, &offset);
3d725965f836a7a David Rientjes 2021-12-07  258  	vfs_fsync(fp, 0);
3d725965f836a7a David Rientjes 2021-12-07  259  	filp_close(fp, NULL);
3d725965f836a7a David Rientjes 2021-12-07  260  
3d725965f836a7a David Rientjes 2021-12-07  261  	if (nwrite != NV_LENGTH) {
3d725965f836a7a David Rientjes 2021-12-07  262  		dev_err(sev->dev,
3d725965f836a7a David Rientjes 2021-12-07  263  			"SEV: failed to write %u bytes to non volatile memory area, ret %ld\n",
3d725965f836a7a David Rientjes 2021-12-07  264  			NV_LENGTH, nwrite);
3c3fe5b1821e961 Jacky Li       2022-08-02  265  		return -EIO;
3d725965f836a7a David Rientjes 2021-12-07  266  	}
3d725965f836a7a David Rientjes 2021-12-07  267  
3d725965f836a7a David Rientjes 2021-12-07  268  	dev_dbg(sev->dev, "SEV: write successful to NV file\n");
3c3fe5b1821e961 Jacky Li       2022-08-02  269  
3c3fe5b1821e961 Jacky Li       2022-08-02  270  	return 0;
3d725965f836a7a David Rientjes 2021-12-07  271  }
3d725965f836a7a David Rientjes 2021-12-07  272  

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