linux-kernel - [hverkuil-media-tree:dp-mst-cec 5/5] drivers/gpu/drm/display/drm_dp_mst_topology.c:2284:95: warning: format specifies type 'long' but the argument has type 'ssize

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Date:   Thu, 20 Oct 2022 09:14:20 +0800
From:   kernel test robot <lkp@...el.com>
To:     Hans Verkuil <hverkuil@...all.nl>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [hverkuil-media-tree:dp-mst-cec 5/5]
 drivers/gpu/drm/display/drm_dp_mst_topology.c:2284:95: warning: format
 specifies type 'long' but the argument has type 'ssize_t' (aka 'int')

tree:   git://linuxtv.org/hverkuil/media_tree.git dp-mst-cec
head:   5f7a53b4332a55f79cace13e261c087f5bae1463
commit: 5f7a53b4332a55f79cace13e261c087f5bae1463 [5/5] wip
config: hexagon-randconfig-r013-20221019
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git remote add hverkuil-media-tree git://linuxtv.org/hverkuil/media_tree.git
        git fetch --no-tags hverkuil-media-tree dp-mst-cec
        git checkout 5f7a53b4332a55f79cace13e261c087f5bae1463
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/display/

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/display/drm_dp_mst_topology.c:2284:95: warning: format specifies type 'long' but the argument has type 'ssize_t' (aka 'int') [-Wformat]
                   pr_info("drm_dp_mst_dpcd_read %px %px %d %ld\n", aux, port, !!port->mgr->cbs->poll_hpd_irq, s);
                                                            ~~~                                                ^
                                                            %zd
   include/linux/printk.h:537:34: note: expanded from macro 'pr_info'
           printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
                                   ~~~     ^~~~~~~~~~~
   include/linux/printk.h:464:60: note: expanded from macro 'printk'
   #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
                                                       ~~~    ^~~~~~~~~~~
   include/linux/printk.h:436:19: note: expanded from macro 'printk_index_wrap'
                   _p_func(_fmt, ##__VA_ARGS__);                           \
                           ~~~~    ^~~~~~~~~~~
   drivers/gpu/drm/display/drm_dp_mst_topology.c:3773:1: warning: unused function 'drm_dp_mst_aux_transfer' [-Wunused-function]
   drm_dp_mst_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
   ^
   2 warnings generated.
--
>> drivers/gpu/drm/display/drm_dp_aux_dev.c:180:77: warning: format specifies type 'long' but the argument has type 'ssize_t' (aka 'int') [-Wformat]
                   pr_info("drm_dp_aux %px %d %ld\n", aux_dev->aux, aux_dev->aux->is_remote, res);
                                              ~~~                                            ^~~
                                              %zd
   include/linux/printk.h:537:34: note: expanded from macro 'pr_info'
           printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
                                   ~~~     ^~~~~~~~~~~
   include/linux/printk.h:464:60: note: expanded from macro 'printk'
   #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
                                                       ~~~    ^~~~~~~~~~~
   include/linux/printk.h:436:19: note: expanded from macro 'printk_index_wrap'
                   _p_func(_fmt, ##__VA_ARGS__);                           \
                           ~~~~    ^~~~~~~~~~~
   1 warning generated.


vim +2284 drivers/gpu/drm/display/drm_dp_mst_topology.c

  2260	
  2261	/**
  2262	 * drm_dp_mst_dpcd_read() - read a series of bytes from the DPCD via sideband
  2263	 * @aux: Fake sideband AUX CH
  2264	 * @offset: address of the (first) register to read
  2265	 * @buffer: buffer to store the register values
  2266	 * @size: number of bytes in @buffer
  2267	 *
  2268	 * Performs the same functionality for remote devices via
  2269	 * sideband messaging as drm_dp_dpcd_read() does for local
  2270	 * devices via actual AUX CH.
  2271	 *
  2272	 * Return: Number of bytes read, or negative error code on failure.
  2273	 */
  2274	ssize_t drm_dp_mst_dpcd_read(struct drm_dp_aux *aux,
  2275				     unsigned int offset, void *buffer, size_t size)
  2276	{
  2277		struct drm_dp_mst_port *port = container_of(aux, struct drm_dp_mst_port,
  2278							    aux);
  2279		ssize_t s;
  2280	
  2281		s = drm_dp_send_dpcd_read(port->mgr, port,
  2282					     offset, size, buffer);
  2283		if (s < 0)
> 2284			pr_info("drm_dp_mst_dpcd_read %px %px %d %ld\n", aux, port, !!port->mgr->cbs->poll_hpd_irq, s);
  2285		return s;
  2286	}
  2287	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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