ALSA: ump: Fix -Wformat-truncation warnings
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: 5f11dd938fe7 ("ALSA: usb-audio: Attach legacy rawmidi after probing all UMP EPs")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
diff --git a/sound/core/ump.c b/sound/core/ump.c
index cd192be..3bef194 100644
--- a/sound/core/ump.c
+++ b/sound/core/ump.c
@@ -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;
