update_port_infos() is called when a UMP FB Info update notification
is received, and this function is supposed to update the attributes of
the corresponding sequencer port. However, the function had a few
issues and it brought to the incorrect states. Namely:
- It tried to get a wrong sequencer info for the update without
correcting the port number with the group-offset 1
- The loop exited immediately when a sequencer port isn't present;
this ended up with the truncation if a sequencer port in the middle
goes away
This patch addresses those bugs.
Fixes: 4a16a3af05 ("ALSA: seq: ump: Handle FB info update")
Link: https://patch.msgid.link/20241128170423.23351-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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