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Date: Wed, 31 Jan 2024 17:34:49 +0800
From: kernel test robot <lkp@intel.com>
To: Mario Limonciello <mario.limonciello@amd.com>,
	amd-gfx@lists.freedesktop.org,
	Alex Deucher <alexander.deucher@amd.com>,
	Harry Wentland <harry.wentland@amd.com>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Hans de Goede <hdegoede@redhat.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
	"open list:ACPI" <linux-acpi@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	"open list:DRM DRIVERS" <dri-devel@lists.freedesktop.org>,
	Melissa Wen <mwen@igalia.com>,
	Mark Pearson <mpearson-lenovo@squebb.ca>,
	Mario Limonciello <mario.limonciello@amd.com>
Subject: Re: [PATCH v2 2/4] drm: Add drm_get_acpi_edid() helper
Message-ID: <202401311759.htfj4nbl-lkp@intel.com>
References: <20240130192608.11666-3-mario.limonciello@amd.com>
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In-Reply-To: <20240130192608.11666-3-mario.limonciello@amd.com>

Hi Mario,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on rafael-pm/acpi-bus linus/master v6.8-rc2 next-20240131]
[cannot apply to drm-misc/drm-misc-next rafael-pm/devprop]
[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/Mario-Limonciello/ACPI-video-Handle-fetching-EDID-that-is-longer-than-256-bytes/20240131-032909
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20240130192608.11666-3-mario.limonciello%40amd.com
patch subject: [PATCH v2 2/4] drm: Add drm_get_acpi_edid() helper
config: i386-buildonly-randconfig-001-20240131 (https://download.01.org/0day-ci/archive/20240131/202401311759.htfj4nbl-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/20240131/202401311759.htfj4nbl-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/202401311759.htfj4nbl-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/acpi/acpi_video.c:642:44: warning: format specifies type 'long' but the argument has type 'ssize_t' (aka 'int') [-Wformat]
     642 |                                  "Invalid _DDC data for length %ld\n", length);
         |                                                                ~~~     ^~~~~~
         |                                                                %zd
   include/linux/acpi.h:1219:30: note: expanded from macro 'acpi_handle_debug'
    1219 |                            handle, pr_fmt(fmt), ##__VA_ARGS__)
         |                                           ~~~     ^~~~~~~~~~~
   include/linux/dynamic_debug.h:250:59: note: expanded from macro '_dynamic_func_call'
     250 |         _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
         |                                                                  ^~~~~~~~~~~
   include/linux/dynamic_debug.h:248:65: note: expanded from macro '_dynamic_func_call_cls'
     248 |         __dynamic_func_call_cls(__UNIQUE_ID(ddebug), cls, fmt, func, ##__VA_ARGS__)
         |                                                                        ^~~~~~~~~~~
   include/linux/dynamic_debug.h:224:15: note: expanded from macro '__dynamic_func_call_cls'
     224 |                 func(&id, ##__VA_ARGS__);                       \
         |                             ^~~~~~~~~~~
   1 warning generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for ACPI_WMI
   Depends on [n]: X86_PLATFORM_DEVICES [=n] && ACPI [=y]
   Selected by [y]:
   - DRM [=y] && HAS_IOMEM [=y] && (AGP [=n] || AGP [=n]=n) && !EMULATED_CMPXCHG && HAS_DMA [=y] && X86 [=y]


vim +642 drivers/acpi/acpi_video.c

^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  612  
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  613  static int
4be44fcd3bf648 drivers/acpi/video.c      Len Brown         2005-08-05  614  acpi_video_device_EDID(struct acpi_video_device *device,
4be44fcd3bf648 drivers/acpi/video.c      Len Brown         2005-08-05  615  		       union acpi_object **edid, ssize_t length)
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  616  {
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  617  	int status;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  618  	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  619  	union acpi_object *obj;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  620  	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  621  	struct acpi_object_list args = { 1, &arg0 };
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  622  
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  623  
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  624  	*edid = NULL;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  625  
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  626  	if (!device)
d550d98d331737 drivers/acpi/video.c      Patrick Mochel    2006-06-27  627  		return -ENODEV;
25f97b27045655 drivers/acpi/acpi_video.c Mario Limonciello 2024-01-30  628  	if (!length || (length % 128))
d550d98d331737 drivers/acpi/video.c      Patrick Mochel    2006-06-27  629  		return -EINVAL;
25f97b27045655 drivers/acpi/acpi_video.c Mario Limonciello 2024-01-30  630  	arg0.integer.value = length / 128;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  631  
901302688cb85b drivers/acpi/video.c      Patrick Mochel    2006-05-19  632  	status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  633  	if (ACPI_FAILURE(status))
d550d98d331737 drivers/acpi/video.c      Patrick Mochel    2006-06-27  634  		return -ENODEV;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  635  
50dd096973f1d9 drivers/acpi/video.c      Jan Engelhardt    2006-10-01  636  	obj = buffer.pointer;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  637  
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  638  	if (obj && obj->type == ACPI_TYPE_BUFFER)
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  639  		*edid = obj;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  640  	else {
25f97b27045655 drivers/acpi/acpi_video.c Mario Limonciello 2024-01-30  641  		acpi_handle_debug(device->dev->handle,
25f97b27045655 drivers/acpi/acpi_video.c Mario Limonciello 2024-01-30 @642  				 "Invalid _DDC data for length %ld\n", length);
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  643  		status = -EFAULT;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  644  		kfree(obj);
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  645  	}
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  646  
d550d98d331737 drivers/acpi/video.c      Patrick Mochel    2006-06-27  647  	return status;
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  648  }
^1da177e4c3f41 drivers/acpi/video.c      Linus Torvalds    2005-04-16  649  

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