diff options
| author | Takashi Iwai <tiwai@suse.de> | 2024-11-27 10:00:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-05 16:02:58 +0300 |
| commit | acd3e1859e9a940b48cf186a07a5cf5629b203e7 (patch) | |
| tree | f57c04123974ba426fbb178c81c0a6f6adfc60c3 /sound/core | |
| parent | df225df83925f87f7a257c77810452db4fdf2599 (diff) | |
| download | linux-acd3e1859e9a940b48cf186a07a5cf5629b203e7.tar.xz | |
ALSA: ump: Fix evaluation of MIDI 1.0 FB info
commit 7be34f6feedd60e418de1c2c48e661d70416635f upstream.
The m1.0 field of UMP Function Block info specifies whether the given
FB is a MIDI 1.0 port or not. When implementing the UMP support on
Linux, I somehow interpreted as if it were bit flags, but the field is
actually an enumeration from 0 to 2, where 2 means MIDI 1.0 *and* low
speed.
This patch corrects the interpretation and sets the right bit flags
depending on the m1.0 field of FB Info. This effectively fixes the
missing detection of MIDI 1.0 FB when m1.0 is 2.
Fixes: 37e0e14128e0 ("ALSA: ump: Support UMP Endpoint and Function Block parsing")
Cc: <stable@vger.kernel.org>
Link: https://patch.msgid.link/20241127070059.8099-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/ump.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sound/core/ump.c b/sound/core/ump.c index 7d59a0a9b037..8d37f237f83b 100644 --- a/sound/core/ump.c +++ b/sound/core/ump.c @@ -788,7 +788,10 @@ static void fill_fb_info(struct snd_ump_endpoint *ump, info->ui_hint = buf->fb_info.ui_hint; info->first_group = buf->fb_info.first_group; info->num_groups = buf->fb_info.num_groups; - info->flags = buf->fb_info.midi_10; + if (buf->fb_info.midi_10 < 2) + info->flags = buf->fb_info.midi_10; + else + info->flags = SNDRV_UMP_BLOCK_IS_MIDI1 | SNDRV_UMP_BLOCK_IS_LOWSPEED; info->active = buf->fb_info.active; info->midi_ci_version = buf->fb_info.midi_ci_version; info->sysex8_streams = buf->fb_info.sysex8_streams; |