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usb: gadget: midi2: Fix missing UMP group attributes initialization 

commit 21d8525d2e upstream.

The gadget card driver forgot to call snd_ump_update_group_attrs()
after adding FBs, and this leaves the UMP group attributes
uninitialized.  As a result, -ENODEV error is returned at opening a
legacy rawmidi device as an inactive group.

This patch adds the missing call to address the behavior above.

Fixes: 8b645922b2 ("usb: gadget: Add support for USB MIDI 2.0 function driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20250904153932.13589-1-tiwai@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2025-09-04 17:39:24 +02:00 committed by Greg Kroah-Hartman
parent edfa1f21c2
commit 47949bcf66
1 changed files with 1 additions and 0 deletions
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drivers/usb/gadget/function/f_midi2.c
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@ -1601,6 +1601,7 @@ static int f_midi2_create_card(struct f_midi2 *midi2)
strscpy(fb->info.name, ump_fb_name(b),
sizeof(fb->info.name));
}
snd_ump_update_group_attrs(ump);
}
for (i = 0; i < midi2->num_eps; i++) {