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ALSA: ump: Fix -Wformat-truncation warnings

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Filling the rawmidi name and substream name can be truncated, and this
leads to spurious compiler warnings due to -Wformat-truncation.
Although the truncation is the expected behavior, it'd be better to
truncate the string within "(...)"

This patch puts the precision specifies to each %s for fitting the
words within the size-limited strings.

Fixes: 5f11dd938f ("ALSA: usb-audio: Attach legacy rawmidi after probing all UMP EPs")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308251844.1FuQYsql-lkp@intel.com/
Link: https://lore.kernel.org/r/20230826072151.23408-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2023-08-26 09:21:51 +02:00
parent 61698d3fbd
commit 4aa69d64e4
1 changed files with 2 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
sound/core/ump.c
View file

@ -1157,7 +1157,7 @@ static void fill_substream_names(struct snd_ump_endpoint *ump,
struct snd_rawmidi_substream *s;
list_for_each_entry(s, &rmidi->streams[dir].substreams, list)
snprintf(s->name, sizeof(s->name), "Group %d (%s)",
snprintf(s->name, sizeof(s->name), "Group %d (%.16s)",
ump->legacy_mapping[s->number] + 1, ump->info.name);
}
@ -1191,7 +1191,7 @@ int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump,
if (output)
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&snd_ump_legacy_output_ops);
snprintf(rmidi->name, sizeof(rmidi->name), "%s (MIDI 1.0)",
snprintf(rmidi->name, sizeof(rmidi->name), "%.68s (MIDI 1.0)",
ump->info.name);
rmidi->info_flags = ump->core.info_flags & ~SNDRV_RAWMIDI_INFO_UMP;
rmidi->ops = &snd_ump_legacy_ops;