6.6-stable review patch. If anyone has any objections, please let me know.
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From: Takashi Iwai tiwai@suse.de
commit 21d8525d2e061cde034277d518411b02eac764e2 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: 8b645922b223 ("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 --- drivers/usb/gadget/function/f_midi2.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/usb/gadget/function/f_midi2.c +++ b/drivers/usb/gadget/function/f_midi2.c @@ -1601,6 +1601,7 @@ static int f_midi2_create_card(struct f_ 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++) {