1 files changed, 8 insertions, 4 deletions

diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c
index 09f70ee4d04a..046007ddbcae 100644
--- a/sound/firewire/amdtp.c
+++ b/sound/firewire/amdtp.c
@@ -228,11 +228,15 @@ static unsigned int calculate_syt(struct amdtp_out_stream *s,
                 syt_offset = s->last_syt_offset - TICKS_PER_CYCLE;
         s->last_syt_offset = syt_offset;
 
-        syt_offset += TRANSFER_DELAY_TICKS - TICKS_PER_CYCLE;
-        syt = (cycle + syt_offset / TICKS_PER_CYCLE) << 12;
-        syt += syt_offset % TICKS_PER_CYCLE;
+        if (syt_offset < TICKS_PER_CYCLE) {
+                syt_offset += TRANSFER_DELAY_TICKS - TICKS_PER_CYCLE;
+                syt = (cycle + syt_offset / TICKS_PER_CYCLE) << 12;
+                syt += syt_offset % TICKS_PER_CYCLE;
 
-        return syt & 0xffff;
+                return syt & 0xffff;
+        } else {
+                return 0xffff; /* no info */
+        }
 }
 
 static void amdtp_write_s32(struct amdtp_out_stream *s,