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Date:   Wed, 6 Dec 2023 22:22:06 +0800
From:   kernel test robot <lkp@intel.com>
To:     Hugo Villeneuve <hugo@hugovil.com>, gregkh@linuxfoundation.org,
        jirislaby@kernel.org, hvilleneuve@dimonoff.com
Cc:     oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
        linux-serial@vger.kernel.org, hugo@hugovil.com
Subject: Re: [PATCH 7/7] serial: max310x: use separate regmap name for each
 port
Message-ID: <202312062240.v39k99mQ-lkp@intel.com>
References: <20231130191050.3165862-8-hugo@hugovil.com>
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Content-Type: text/plain; charset=us-ascii
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In-Reply-To: <20231130191050.3165862-8-hugo@hugovil.com>
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Hi Hugo,

kernel test robot noticed the following build warnings:

[auto build test WARNING on d804987153e7bedf503f8e4ba649afe52cfd7f6d]

url:    https://github.com/intel-lab-lkp/linux/commits/Hugo-Villeneuve/serial-sc16is7xx-fix-snprintf-format-specifier-in-sc16is7xx_regmap_name/20231201-031413
base:   d804987153e7bedf503f8e4ba649afe52cfd7f6d
patch link:    https://lore.kernel.org/r/20231130191050.3165862-8-hugo%40hugovil.com
patch subject: [PATCH 7/7] serial: max310x: use separate regmap name for each port
config: arm-randconfig-r081-20231201 (https://download.01.org/0day-ci/archive/20231206/202312062240.v39k99mQ-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231206/202312062240.v39k99mQ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312062240.v39k99mQ-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In function 'max310x_regmap_name',
       inlined from 'max310x_i2c_probe' at drivers/tty/serial/max310x.c:1641:21:
>> drivers/tty/serial/max310x.c:30:41: warning: '%u' directive output may be truncated writing between 1 and 10 bytes into a region of size 2 [-Wformat-truncation=]
      30 | #define MAX310X_PORT_NAME_SUFFIX        "port"
         |                                         ^~~~~~
   drivers/tty/serial/max310x.c:1494:36: note: in expansion of macro 'MAX310X_PORT_NAME_SUFFIX'
    1494 |         snprintf(buf, sizeof(buf), MAX310X_PORT_NAME_SUFFIX "%u", port_id);
         |                                    ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/tty/serial/max310x.c: In function 'max310x_i2c_probe':
   drivers/tty/serial/max310x.c:1494:62: note: format string is defined here
    1494 |         snprintf(buf, sizeof(buf), MAX310X_PORT_NAME_SUFFIX "%u", port_id);
         |                                                              ^~
   In function 'max310x_regmap_name',
       inlined from 'max310x_i2c_probe' at drivers/tty/serial/max310x.c:1641:21:
   drivers/tty/serial/max310x.c:30:41: note: directive argument in the range [1, 4294967294]
      30 | #define MAX310X_PORT_NAME_SUFFIX        "port"
         |                                         ^~~~~~
   drivers/tty/serial/max310x.c:1494:36: note: in expansion of macro 'MAX310X_PORT_NAME_SUFFIX'
    1494 |         snprintf(buf, sizeof(buf), MAX310X_PORT_NAME_SUFFIX "%u", port_id);
         |                                    ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/tty/serial/max310x.c:1494:9: note: 'snprintf' output between 6 and 15 bytes into a destination of size 6
    1494 |         snprintf(buf, sizeof(buf), MAX310X_PORT_NAME_SUFFIX "%u", port_id);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   In function 'max310x_regmap_name',
       inlined from 'max310x_spi_probe' at drivers/tty/serial/max310x.c:1535:17:
>> drivers/tty/serial/max310x.c:30:41: warning: '%u' directive output may be truncated writing between 1 and 10 bytes into a region of size 2 [-Wformat-truncation=]
      30 | #define MAX310X_PORT_NAME_SUFFIX        "port"
         |                                         ^~~~~~
   drivers/tty/serial/max310x.c:1494:36: note: in expansion of macro 'MAX310X_PORT_NAME_SUFFIX'
    1494 |         snprintf(buf, sizeof(buf), MAX310X_PORT_NAME_SUFFIX "%u", port_id);
         |                                    ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/tty/serial/max310x.c: In function 'max310x_spi_probe':
   drivers/tty/serial/max310x.c:1494:62: note: format string is defined here
    1494 |         snprintf(buf, sizeof(buf), MAX310X_PORT_NAME_SUFFIX "%u", port_id);
         |                                                              ^~
   In function 'max310x_regmap_name',
       inlined from 'max310x_spi_probe' at drivers/tty/serial/max310x.c:1535:17:
   drivers/tty/serial/max310x.c:30:41: note: directive argument in the range [0, 4294967294]
      30 | #define MAX310X_PORT_NAME_SUFFIX        "port"
         |                                         ^~~~~~
   drivers/tty/serial/max310x.c:1494:36: note: in expansion of macro 'MAX310X_PORT_NAME_SUFFIX'
    1494 |         snprintf(buf, sizeof(buf), MAX310X_PORT_NAME_SUFFIX "%u", port_id);
         |                                    ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/tty/serial/max310x.c:1494:9: note: 'snprintf' output between 6 and 15 bytes into a destination of size 6
    1494 |         snprintf(buf, sizeof(buf), MAX310X_PORT_NAME_SUFFIX "%u", port_id);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +30 drivers/tty/serial/max310x.c

    28	
    29	#define MAX310X_NAME			"max310x"
  > 30	#define MAX310X_PORT_NAME_SUFFIX	"port"
    31	#define MAX310X_MAJOR			204
    32	#define MAX310X_MINOR			209
    33	#define MAX310X_UART_NRMAX		16
    34	#define MAX310X_MAX_PORTS		4 /* Maximum number of UART ports per IC. */
    35	

-- 
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https://github.com/intel/lkp-tests/wiki