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ALSA: firewire-lib: code refactoring for post operation to data block counter 

As a result of former commits, post operation to data block count for
cases without CIP_DBC_IS_END_EVENT can be done just with
data_block_counter member of amdtp_stream structure.

This commit adds code refactoring to obsolete local variable for
data block counter.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2019-07-07 21:07:58 +09:00 committed by Takashi Iwai
parent b8b0e24c22
commit 02394af3e0
1 changed files with 10 additions and 10 deletions
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20
sound/firewire/amdtp-stream.c
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@ -616,9 +616,10 @@ static int check_cip_header(struct amdtp_stream *s, const __be32 *buf,
static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle, static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,
const __be32 *ctx_header, const __be32 *ctx_header,
unsigned int *payload_length, unsigned int *payload_length,
unsigned int *data_blocks, unsigned int *dbc, unsigned int *data_blocks, unsigned int *syt,
unsigned int *syt, unsigned int index) unsigned int index)
{ {
unsigned int dbc;
const __be32 *cip_header; const __be32 *cip_header;
int err; int err;
@ -634,7 +635,7 @@ static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,
if (!(s->flags & CIP_NO_HEADER)) { if (!(s->flags & CIP_NO_HEADER)) {
cip_header = ctx_header + 2; cip_header = ctx_header + 2;
err = check_cip_header(s, cip_header, *payload_length, err = check_cip_header(s, cip_header, *payload_length,
data_blocks, dbc, syt); data_blocks, &dbc, syt);
if (err < 0) if (err < 0)
return err; return err;
} else { } else {
@ -645,12 +646,12 @@ static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,
*syt = 0; *syt = 0;
if (s->data_block_counter != UINT_MAX) if (s->data_block_counter != UINT_MAX)
*dbc = s->data_block_counter; dbc = s->data_block_counter;
else else
*dbc = 0; dbc = 0;
} }
s->data_block_counter = *dbc; s->data_block_counter = dbc;
trace_amdtp_packet(s, cycle, cip_header, *payload_length, *data_blocks, trace_amdtp_packet(s, cycle, cip_header, *payload_length, *data_blocks,
index); index);
@ -758,7 +759,6 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
u32 cycle; u32 cycle;
unsigned int payload_length; unsigned int payload_length;
unsigned int data_blocks; unsigned int data_blocks;
unsigned int dbc;
unsigned int syt; unsigned int syt;
__be32 *buffer; __be32 *buffer;
unsigned int pcm_frames = 0; unsigned int pcm_frames = 0;
@ -768,7 +768,7 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
cycle = compute_cycle_count(ctx_header[1]); cycle = compute_cycle_count(ctx_header[1]);
err = parse_ir_ctx_header(s, cycle, ctx_header, &payload_length, err = parse_ir_ctx_header(s, cycle, ctx_header, &payload_length,
&data_blocks, &dbc, &syt, i); &data_blocks, &syt, i);
if (err < 0 && err != -EAGAIN) if (err < 0 && err != -EAGAIN)
break; break;
@ -778,8 +778,8 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
data_blocks, &syt); data_blocks, &syt);
if (!(s->flags & CIP_DBC_IS_END_EVENT)) { if (!(s->flags & CIP_DBC_IS_END_EVENT)) {
s->data_block_counter = s->data_block_counter += data_blocks;
(dbc + data_blocks) & 0xff; s->data_block_counter &= 0xff;
} }
} }