ALSA: isight: fix packet requeueing

After handling a received packet, we want to resubmit the same packet,
so do not increase the packet index too early.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 3 deletions

diff --git a/sound/firewire/isight.c b/sound/firewire/isight.c
index 0230605c917e..4e334919a70f 100644
--- a/sound/firewire/isight.c
+++ b/sound/firewire/isight.c
@@ -198,9 +198,6 @@ static void isight_packet(struct fw_iso_context *context, u32 cycle,
                 }
         }
 
-        if (++index >= QUEUE_LENGTH)
-                index = 0;
-
         err = fw_iso_context_queue(isight->context, &audio_packet,
                                    &isight->buffer.iso_buffer,
                                    isight->buffer.packets[index].offset);
@@ -211,6 +208,8 @@ static void isight_packet(struct fw_iso_context *context, u32 cycle,
                 return;
         }
 
+        if (++index >= QUEUE_LENGTH)
+                index = 0;
         isight->packet_index = index;
 }