The size of CIP payload is now passed to helper function to parse CIP
header.
Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
---
sound/firewire/amdtp-stream.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 1c530678e56a..1ff25e6b0c78 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -574,8 +574,7 @@ static int check_cip_header(struct amdtp_stream *s, const __be32 *buf,
/* Calculate data blocks */
fdf = (cip_header[1] & CIP_FDF_MASK) >> CIP_FDF_SHIFT;
- if (payload_length < sizeof(__be32) * 2 ||
- (fmt == CIP_FMT_AM && fdf == AMDTP_FDF_NO_DATA)) {
+ if (payload_length == 0 || (fmt == CIP_FMT_AM && fdf == AMDTP_FDF_NO_DATA)) {
*data_blocks = 0;
} else {
unsigned int data_block_quadlets =
@@ -590,8 +589,7 @@ static int check_cip_header(struct amdtp_stream *s, const __be32 *buf,
if (s->flags & CIP_WRONG_DBS)
data_block_quadlets = s->data_block_quadlets;
- *data_blocks = (payload_length / sizeof(__be32) - 2) /
- data_block_quadlets;
+ *data_blocks = payload_length / sizeof(__be32) / data_block_quadlets;
}
/* Check data block counter continuity */
@@ -658,8 +656,8 @@ static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,
if (cip_header_size > 0) {
if (payload_length >= cip_header_size) {
cip_header = ctx_header + 2;
- err = check_cip_header(s, cip_header, payload_length, data_blocks,
- data_block_counter, syt);
+ err = check_cip_header(s, cip_header, payload_length - cip_header_size,
+ data_blocks, data_block_counter, syt);
if (err < 0)
return err;
} else {
--
2.27.0
