Re: [PATCH 14/14] greybus: cpc: add CPC SDIO host driver

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

Hi Damien,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.18 next-20251212]
[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/Damien-Ri-gel/greybus-cpc-add-minimal-CPC-Host-Device-infrastructure/20251213-010308
base:   linus/master
patch link:    https://lore.kernel.org/r/20251212161308.25678-15-damien.riegel%40silabs.com
patch subject: [PATCH 14/14] greybus: cpc: add CPC SDIO host driver
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20251214/202512140305.VFN3KkVr-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512140305.VFN3KkVr-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/202512140305.VFN3KkVr-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/greybus/cpc/sdio.c:166:59: warning: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Wformat]
     166 |                 dev_dbg(ctx->dev, "Invalid Greybus header size: %lu\n", gb_size);
         |                                                                 ~~~     ^~~~~~~
         |                                                                 %zu
   include/linux/dev_printk.h:165:39: note: expanded from macro 'dev_dbg'
     165 |         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                                      ~~~     ^~~~~~~~~~~
   include/linux/dynamic_debug.h:285:19: note: expanded from macro 'dynamic_dev_dbg'
     285 |                            dev, fmt, ##__VA_ARGS__)
         |                                 ~~~    ^~~~~~~~~~~
   include/linux/dynamic_debug.h:261:59: note: expanded from macro '_dynamic_func_call'
     261 |         _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
         |                                                                  ^~~~~~~~~~~
   include/linux/dynamic_debug.h:259:65: note: expanded from macro '_dynamic_func_call_cls'
     259 |         __dynamic_func_call_cls(__UNIQUE_ID(ddebug), cls, fmt, func, ##__VA_ARGS__)
         |                                                                        ^~~~~~~~~~~
   include/linux/dynamic_debug.h:231:15: note: expanded from macro '__dynamic_func_call_cls'
     231 |                 func(&id, ##__VA_ARGS__);                       \
         |                             ^~~~~~~~~~~
   drivers/greybus/cpc/sdio.c:172:60: warning: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Wformat]
     172 |                 dev_dbg(ctx->dev, "Payload size exceeds maximum: %lu\n", gb_size);
         |                                                                  ~~~     ^~~~~~~
         |                                                                  %zu
   include/linux/dev_printk.h:165:39: note: expanded from macro 'dev_dbg'
     165 |         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                                      ~~~     ^~~~~~~~~~~
   include/linux/dynamic_debug.h:285:19: note: expanded from macro 'dynamic_dev_dbg'
     285 |                            dev, fmt, ##__VA_ARGS__)
         |                                 ~~~    ^~~~~~~~~~~
   include/linux/dynamic_debug.h:261:59: note: expanded from macro '_dynamic_func_call'
     261 |         _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
         |                                                                  ^~~~~~~~~~~
   include/linux/dynamic_debug.h:259:65: note: expanded from macro '_dynamic_func_call_cls'
     259 |         __dynamic_func_call_cls(__UNIQUE_ID(ddebug), cls, fmt, func, ##__VA_ARGS__)
         |                                                                        ^~~~~~~~~~~
   include/linux/dynamic_debug.h:231:15: note: expanded from macro '__dynamic_func_call_cls'
     231 |                 func(&id, ##__VA_ARGS__);                       \
         |                             ^~~~~~~~~~~
   2 warnings generated.


vim +166 drivers/greybus/cpc/sdio.c

   156	
   157	static bool cpc_sdio_get_payload_size(struct cpc_sdio *ctx, const struct frame_header *header,
   158					      size_t *payload_size)
   159	{
   160		size_t gb_size;
   161	
   162		gb_size = le16_to_cpu(header->gb.size);
   163	
   164		/* Validate that the size is at least as large as the Greybus header */
   165		if (gb_size < GREYBUS_HEADER_SIZE) {
 > 166			dev_dbg(ctx->dev, "Invalid Greybus header size: %lu\n", gb_size);
   167			return false;
   168		}
   169	
   170		/* Validate maximum size */
   171		if (gb_size > (GB_CPC_SDIO_MSG_SIZE_MAX + GREYBUS_HEADER_SIZE)) {
   172			dev_dbg(ctx->dev, "Payload size exceeds maximum: %lu\n", gb_size);
   173			return false;
   174		}
   175	
   176		/* Size includes the Greybus header, so subtract it to get payload size */
   177		*payload_size = gb_size - GREYBUS_HEADER_SIZE;
   178	
   179		return true;
   180	}
   181	

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