ALSA: hda: intel-sdw-acpi: Use u8 type for link index
authorPeter Ujfalusi <peter.ujfalusi@linux.intel.com>
Tue, 12 Sep 2023 16:26:17 +0000 (19:26 +0300)
committerTakashi Iwai <tiwai@suse.de>
Wed, 13 Sep 2023 07:43:10 +0000 (09:43 +0200)
commit485ddd519fbd89a9d9ac4b02be489e03cbbeebba
treecec8dfd40dad5966223c4fed7ddf6c39817cc769
parent0342518b0c15481dd4359b499301711b2f9a796c
ALSA: hda: intel-sdw-acpi: Use u8 type for link index

Use consistently u8 for sdw link index. The id is limited to 4, u8 is
adequate in size to store it.

This change will also fixes the following compiler warning/error (W=1):

sound/hda/intel-sdw-acpi.c: In function ‘sdw_intel_acpi_scan’:
sound/hda/intel-sdw-acpi.c:34:35: error: ‘-subproperties’ directive output may be truncated writing 14 bytes into a region of size between 7 and 17 [-Werror=format-truncation=]
   34 |                  "mipi-sdw-link-%d-subproperties", i);
      |                                   ^~~~~~~~~~~~~~
In function ‘is_link_enabled’,
    inlined from ‘sdw_intel_scan_controller’ at sound/hda/intel-sdw-acpi.c:106:8,
    inlined from ‘sdw_intel_acpi_scan’ at sound/hda/intel-sdw-acpi.c:180:9:
sound/hda/intel-sdw-acpi.c:33:9: note: ‘snprintf’ output between 30 and 40 bytes into a destination of size 32
   33 |         snprintf(name, sizeof(name),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   34 |                  "mipi-sdw-link-%d-subproperties", i);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

The warnings got brought to light by a recent patch upstream:
commit 6d4ab2e97dcf ("extrawarn: enable format and stringop overflow warnings in W=1")

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230912162617.29178-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/hda/intel-sdw-acpi.c