This is a note to let you know that I've just added the patch titled usb: gadget: f_uac1: stop playback on function disable to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-gadget-f_uac1-stop-playback-on-function-disable.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From cc2ac63d4cf72104e0e7f58bb846121f0f51bb19 Mon Sep 17 00:00:00 2001 From: Ruslan Bilovol <ruslan.bilovol@xxxxxxxxx> Date: Mon, 1 Mar 2021 13:49:32 +0200 Subject: usb: gadget: f_uac1: stop playback on function disable From: Ruslan Bilovol <ruslan.bilovol@xxxxxxxxx> commit cc2ac63d4cf72104e0e7f58bb846121f0f51bb19 upstream. There is missing playback stop/cleanup in case of gadget's ->disable callback that happens on events like USB host resetting or gadget disconnection Fixes: 0591bc236015 ("usb: gadget: add f_uac1 variant based on a new u_audio api") Cc: <stable@xxxxxxxxxxxxxxx> # 4.13+ Signed-off-by: Ruslan Bilovol <ruslan.bilovol@xxxxxxxxx> Link: https://lore.kernel.org/r/1614599375-8803-3-git-send-email-ruslan.bilovol@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/gadget/function/f_uac1.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/usb/gadget/function/f_uac1.c +++ b/drivers/usb/gadget/function/f_uac1.c @@ -499,6 +499,7 @@ static void f_audio_disable(struct usb_f uac1->as_out_alt = 0; uac1->as_in_alt = 0; + u_audio_stop_playback(&uac1->g_audio); u_audio_stop_capture(&uac1->g_audio); } Patches currently in stable-queue which might be from ruslan.bilovol@xxxxxxxxx are queue-5.4/usb-gadget-f_uac1-stop-playback-on-function-disable.patch queue-5.4/usb-gadget-f_uac2-always-increase-endpoint-max_packet_size-by-one-audio-slot.patch