Commit 7cb2a542 authored Feb 25, 2026 by Takashi Iwai

ALSA: usb-audio: Check max frame size for implicit feedback mode, too

When the packet sizes are taken from the capture stream in the
implicit feedback mode, the sizes might be larger than the upper
boundary defined by the descriptor.  As already done for other
transfer modes, we have to cap the sizes accordingly at sending,
otherwise this would lead to an error in USB core at submission of
URBs.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=221076


Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260225085233.316306-3-tiwai@suse.de


Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent 7fe8dec3

sound/usb/endpoint.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -221,6 +221,7 @@ int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep,

		packet = ctx->packet_size[idx];
		if (packet) {
		packet = min(packet, ep->maxframesize);
		if (avail && packet >= avail)
		return -EAGAIN;
		return packet;