From: Daniel Mack Date: Fri, 5 Aug 2011 11:49:52 +0000 (+0200) Subject: ALSA: snd-usb-caiaq: Correct offset fields of outbound iso_frame_desc X-Git-Tag: v3.0.3~11 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8adf76d75e7ed6d30c4aa598bf8ac51de50f3adb;p=karo-tx-linux.git ALSA: snd-usb-caiaq: Correct offset fields of outbound iso_frame_desc commit 15439bde3af7ff88459ea2b5520b77312e958df2 upstream. 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 Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c index d0d493ca28ae..aa52b3e13bb5 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); }