From 15439bde3af7ff88459ea2b5520b77312e958df2 Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Fri, 5 Aug 2011 13:49:52 +0200 Subject: [PATCH] ALSA: snd-usb-caiaq: Correct offset fields of outbound iso_frame_desc This fixes faulty outbount packets in case the inbound packets received from the hardware are fragmented and contain bogus input iso frames. The bug has been there for ages, but for some strange reasons, it was only triggered by newer machines in 64bit mode. Signed-off-by: Daniel Mack Reported-and-tested-by: William Light Reported-by: Pedro Ribeiro Cc: stable@kernel.org Signed-off-by: Takashi Iwai --- sound/usb/caiaq/audio.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c index d0d493c..aa52b3e 100644 --- a/sound/usb/caiaq/audio.c +++ b/sound/usb/caiaq/audio.c @@ -614,6 +614,7 @@ static void read_completed(struct urb *urb) struct snd_usb_caiaqdev *dev; struct urb *out; int frame, len, send_it = 0, outframe = 0; + size_t offset = 0; if (urb->status || !info) return; @@ -634,7 +635,8 @@ static void read_completed(struct urb *urb) len = urb->iso_frame_desc[outframe].actual_length; out->iso_frame_desc[outframe].length = len; out->iso_frame_desc[outframe].actual_length = 0; - out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame; + out->iso_frame_desc[outframe].offset = offset; + offset += len; if (len > 0) { spin_lock(&dev->spinlock); @@ -650,7 +652,7 @@ static void read_completed(struct urb *urb) } if (send_it) { - out->number_of_packets = FRAMES_PER_URB; + out->number_of_packets = outframe; out->transfer_flags = URB_ISO_ASAP; usb_submit_urb(out, GFP_ATOMIC); } -- 2.7.4