Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ALSA: ump: Force 1 Group for MIDI1 FBs
When a Function Block declares it being a legacy MIDI1 device, it has
to be only with a single UMP Group. Correct the attribute when a
device declares it wrongly.
Fixes: 37e0e14128e0 ("ALSA: ump: Support UMP Endpoint and Function Block parsing")
Cc: <stable@vger.kernel.org>
Link: https://patch.msgid.link/20240722140610.10845-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
+6
+6
sound/core/ump.c
+6
sound/core/ump.c
···
733
733
info->block_id, info->direction, info->active,
734
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info->first_group, info->num_groups, info->midi_ci_version,
735
735
info->sysex8_streams, info->flags);
736
+
737
+
if ((info->flags & SNDRV_UMP_BLOCK_IS_MIDI1) && info->num_groups != 1) {
738
+
info->num_groups = 1;
739
+
ump_dbg(ump, "FB %d: corrected groups to 1 for MIDI1\n",
740
+
info->block_id);
741
+
}
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}
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738
744
/* check whether the FB info gets updated by the current message */