This commit is a small refactoring for better readability.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/dice/dice-stream.c | 119 ++++++++++++++++++++------------------ 1 file changed, 62 insertions(+), 57 deletions(-)
diff --git a/sound/firewire/dice/dice-stream.c b/sound/firewire/dice/dice-stream.c index f93ecab47b54..7c0a47c73fa9 100644 --- a/sound/firewire/dice/dice-stream.c +++ b/sound/firewire/dice/dice-stream.c @@ -284,6 +284,63 @@ static int start_streams(struct snd_dice *dice, enum amdtp_stream_direction dir, return err; }
+static int start_duplex_streams(struct snd_dice *dice, unsigned int rate) +{ + struct reg_params tx_params, rx_params; + int i; + int err; + + err = get_register_params(dice, &tx_params, &rx_params); + if (err < 0) + return err; + + /* Stop transmission. */ + stop_streams(dice, AMDTP_IN_STREAM, &tx_params); + stop_streams(dice, AMDTP_OUT_STREAM, &rx_params); + snd_dice_transaction_clear_enable(dice); + release_resources(dice); + + err = ensure_phase_lock(dice); + if (err < 0) { + dev_err(&dice->unit->device, "fail to ensure phase lock\n"); + return err; + } + + /* Start both streams. */ + err = start_streams(dice, AMDTP_IN_STREAM, rate, &tx_params); + if (err < 0) + goto error; + err = start_streams(dice, AMDTP_OUT_STREAM, rate, &rx_params); + if (err < 0) + goto error; + + err = snd_dice_transaction_set_enable(dice); + if (err < 0) { + dev_err(&dice->unit->device, "fail to enable interface\n"); + goto error; + } + + for (i = 0; i < MAX_STREAMS; i++) { + if ((i < tx_params.count && + !amdtp_stream_wait_callback(&dice->tx_stream[i], + CALLBACK_TIMEOUT)) || + (i < rx_params.count && + !amdtp_stream_wait_callback(&dice->rx_stream[i], + CALLBACK_TIMEOUT))) { + err = -ETIMEDOUT; + goto error; + } + } + + return 0; +error: + stop_streams(dice, AMDTP_IN_STREAM, &tx_params); + stop_streams(dice, AMDTP_OUT_STREAM, &rx_params); + snd_dice_transaction_clear_enable(dice); + release_resources(dice); + return err; +} + /* * MEMO: After this function, there're two states of streams: * - None streams are running. @@ -293,8 +350,6 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate) { unsigned int curr_rate; unsigned int i; - struct reg_params tx_params, rx_params; - bool need_to_start = false; enum snd_dice_rate_mode mode; int err;
@@ -321,7 +376,7 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate) break; } if (i < MAX_STREAMS) - need_to_start = true; + goto restart;
/* Check required streams are running or not. */ err = snd_dice_stream_get_rate_mode(dice, rate, &mode); @@ -336,61 +391,11 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate) break; } if (i < MAX_STREAMS) - need_to_start = true; - - if (need_to_start) { - err = get_register_params(dice, &tx_params, &rx_params); - if (err < 0) - return err; - - /* Stop transmission. */ - snd_dice_transaction_clear_enable(dice); - stop_streams(dice, AMDTP_IN_STREAM, &tx_params); - stop_streams(dice, AMDTP_OUT_STREAM, &rx_params); - release_resources(dice); + goto restart;
- err = ensure_phase_lock(dice); - if (err < 0) { - dev_err(&dice->unit->device, - "fail to ensure phase lock\n"); - goto error; - } - - /* Start both streams. */ - err = start_streams(dice, AMDTP_IN_STREAM, rate, &tx_params); - if (err < 0) - goto error; - err = start_streams(dice, AMDTP_OUT_STREAM, rate, &rx_params); - if (err < 0) - goto error; - - err = snd_dice_transaction_set_enable(dice); - if (err < 0) { - dev_err(&dice->unit->device, - "fail to enable interface\n"); - goto error; - } - - for (i = 0; i < MAX_STREAMS; i++) { - if ((i < tx_params.count && - !amdtp_stream_wait_callback(&dice->tx_stream[i], - CALLBACK_TIMEOUT)) || - (i < rx_params.count && - !amdtp_stream_wait_callback(&dice->rx_stream[i], - CALLBACK_TIMEOUT))) { - err = -ETIMEDOUT; - goto error; - } - } - } - - return err; -error: - snd_dice_transaction_clear_enable(dice); - stop_streams(dice, AMDTP_IN_STREAM, &tx_params); - stop_streams(dice, AMDTP_OUT_STREAM, &rx_params); - release_resources(dice); - return err; + return 0; +restart: + return start_duplex_streams(dice, rate); }
/*