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[v2,11/37] ALSA: usb-audio: Trim superfluous "MIDI" suffix from UMP EP name

Message ID 20230523075358.9672-12-tiwai@suse.de
State Accepted
Commit 51701400a94e999c3109c84f88273a9face51c4b
Headers show
Series ALSA: Add MIDI 2.0 support | expand

Commit Message

Takashi Iwai May 23, 2023, 7:53 a.m. UTC 
A single USB audio device may have multiple interfaces for different
purposes (e.g. audio, MIDI and HID), where the iInterface descriptor
of each interface may contain an own suffix, e.g. "MIDI" for a MIDI
interface.  as such a suffix is superfluous as a rawmidi and UMP
Endpoint name, this patch trims the superfluous "MIDI" suffix from the
name string.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/midi2.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/sound/usb/midi2.c b/sound/usb/midi2.c
index 2ac3f96216bc..790e4cd5d35c 100644
--- a/sound/usb/midi2.c
+++ b/sound/usb/midi2.c
@@ -896,7 +896,14 @@  static int set_altset(struct snd_usb_midi2_interface *umidi)
 static void fill_ump_ep_name(struct snd_ump_endpoint *ump,
 			     struct usb_device *dev, int id)
 {
+	int len;
+
 	usb_string(dev, id, ump->info.name, sizeof(ump->info.name));
+
+	/* trim superfluous "MIDI" suffix */
+	len = strlen(ump->info.name);
+	if (len > 5 && !strcmp(ump->info.name + len - 5, " MIDI"))
+		ump->info.name[len - 5] = 0;
 }
 
 /* fill the fallback name string for each rawmidi instance */