ALSA: bebob/firewire-lib: Add a quirk of wrong dbc in empty packet for M-Audio specia...

[uclinux-h8/linux.git] / sound / firewire / amdtp.c

diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c
index 690c608..e573f25 100644 (file)
--- a/sound/firewire/amdtp.c
+++ b/sound/firewire/amdtp.c
@@ -665,6 +665,10 @@ static void handle_in_packet(struct amdtp_stream *s,
 
        /* Check data block counter continuity */
        data_block_counter = cip_header[0] & AMDTP_DBC_MASK;
+       if (data_blocks == 0 && (s->flags & CIP_EMPTY_HAS_WRONG_DBC) &&
+           s->data_block_counter != UINT_MAX)
+               data_block_counter = s->data_block_counter;
+
        if (((s->flags & CIP_SKIP_DBC_ZERO_CHECK) && data_block_counter == 0) ||
            (s->data_block_counter == UINT_MAX)) {
                lost = false;