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authorDaniel Mack <zonque@gmail.com>2011-08-05 13:49:52 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-08-17 10:55:53 -0700
commit8adf76d75e7ed6d30c4aa598bf8ac51de50f3adb (patch)
treeaa9f0b70e352ed9c119bffbce6c3501fe421f2f7 /sound/usb
parent8282be4dd5ff3fef30271c61ee74db66524d8350 (diff)
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 <zonque@gmail.com> Reported-and-tested-by: William Light <wrl@illest.net> Reported-by: Pedro Ribeiro <pedrib@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/caiaq/audio.c6
1 files changed, 4 insertions, 2 deletions
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);
}