From 0ebf3ceb83648f9d149220bf0c6986ddce11361a Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Sun, 7 Jul 2019 21:07:53 +0900 Subject: [PATCH] ALSA: firewire-lib: fix invalid length of rx packet payload for tracepoint events Although CIP header is handled as context header, the length of isochronous packet includes two quadlets for its payload. In tracepoints event the value of payload_quadlets should includes the two quadlets. But at present it doesn't. This commit fixes the bug. Fixes: b18f0cfaf16b ("ALSA: firewire-lib: use 8 byte packet header for IT context to separate CIP header from CIP payload") Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/amdtp-stream.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index 87a46bd60496..427624009de9 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -490,8 +490,12 @@ static void build_it_pkt_header(struct amdtp_stream *s, unsigned int cycle, unsigned int data_blocks, unsigned int syt, unsigned int index) { + unsigned int payload_length; __be32 *cip_header; + payload_length = data_blocks * sizeof(__be32) * s->data_block_quadlets; + params->payload_length = payload_length; + if (s->flags & CIP_DBC_IS_END_EVENT) { s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff; @@ -501,6 +505,7 @@ static void build_it_pkt_header(struct amdtp_stream *s, unsigned int cycle, cip_header = (__be32 *)params->header; generate_cip_header(s, cip_header, syt); params->header_length = 2 * sizeof(__be32); + payload_length += params->header_length; } else { cip_header = NULL; } @@ -510,11 +515,8 @@ static void build_it_pkt_header(struct amdtp_stream *s, unsigned int cycle, (s->data_block_counter + data_blocks) & 0xff; } - params->payload_length = - data_blocks * sizeof(__be32) * s->data_block_quadlets; - - trace_amdtp_packet(s, cycle, cip_header, params->payload_length, - data_blocks, index); + trace_amdtp_packet(s, cycle, cip_header, payload_length, data_blocks, + index); } static int check_cip_header(struct amdtp_stream *s, const __be32 *buf, -- 2.30.2