snd_midi_event_encode_byte() can never fail, and it can return rather true/false. Change the return type to bool, adjust the argument to receive a MIDI byte as unsigned char, and adjust the comment accordingly. This allows callers to drop error checks, which simplifies the code.

Meanwhile, snd_midi_event_encode() helper is used only in seq_midi.c, and it can be better folded into it. This will reduce the total amount of lines in the end.

Signed-off-by: Takashi Iwai tiwai@suse.de --- include/sound/seq_midi_event.h | 6 ++--- sound/core/seq/oss/seq_oss_midi.c | 2 +- sound/core/seq/seq_midi.c | 24 ++++++++---------- sound/core/seq/seq_midi_event.c | 42 ++++++------------------------- sound/core/seq/seq_virmidi.c | 4 +-- 5 files changed, 22 insertions(+), 56 deletions(-)

diff --git a/include/sound/seq_midi_event.h b/include/sound/seq_midi_event.h index e40f43e6fc7b..2f135bccf457 100644 --- a/include/sound/seq_midi_event.h +++ b/include/sound/seq_midi_event.h @@ -43,10 +43,8 @@ void snd_midi_event_free(struct snd_midi_event *dev); void snd_midi_event_reset_encode(struct snd_midi_event *dev); void snd_midi_event_reset_decode(struct snd_midi_event *dev); void snd_midi_event_no_status(struct snd_midi_event *dev, int on); -/* encode from byte stream - return number of written bytes if success */ -long snd_midi_event_encode(struct snd_midi_event *dev, unsigned char *buf, long count, - struct snd_seq_event *ev); -int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c, struct snd_seq_event *ev); +bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, + struct snd_seq_event *ev); /* decode from event to bytes - return number of written bytes if success */ long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count, struct snd_seq_event *ev); diff --git a/sound/core/seq/oss/seq_oss_midi.c b/sound/core/seq/oss/seq_oss_midi.c index 9debd1b8fd28..0d5f8b16d057 100644 --- a/sound/core/seq/oss/seq_oss_midi.c +++ b/sound/core/seq/oss/seq_oss_midi.c @@ -637,7 +637,7 @@ snd_seq_oss_midi_putc(struct seq_oss_devinfo *dp, int dev, unsigned char c, stru

if ((mdev = get_mididev(dp, dev)) == NULL) return -ENODEV; - if (snd_midi_event_encode_byte(mdev->coder, c, ev) > 0) { + if (snd_midi_event_encode_byte(mdev->coder, c, ev)) { snd_seq_oss_fill_addr(dp, ev, mdev->client, mdev->port); snd_use_lock_free(&mdev->use_lock); return 0; diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c index 5dd0ee258359..9e0dabd3ce5f 100644 --- a/sound/core/seq/seq_midi.c +++ b/sound/core/seq/seq_midi.c @@ -78,7 +78,7 @@ static void snd_midi_input_event(struct snd_rawmidi_substream *substream) struct seq_midisynth *msynth; struct snd_seq_event ev; char buf[16], *pbuf; - long res, count; + long res;

if (substream == NULL) return; @@ -94,19 +94,15 @@ static void snd_midi_input_event(struct snd_rawmidi_substream *substream) if (msynth->parser == NULL) continue; pbuf = buf; - while (res > 0) { - count = snd_midi_event_encode(msynth->parser, pbuf, res, &ev); - if (count < 0) - break; - pbuf += count; - res -= count; - if (ev.type != SNDRV_SEQ_EVENT_NONE) { - ev.source.port = msynth->seq_port; - ev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; - snd_seq_kernel_client_dispatch(msynth->seq_client, &ev, 1, 0); - /* clear event and reset header */ - memset(&ev, 0, sizeof(ev)); - } + while (res-- > 0) { + if (!snd_midi_event_encode_byte(msynth->parser, + *pbuf++, &ev)) + continue; + ev.source.port = msynth->seq_port; + ev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; + snd_seq_kernel_client_dispatch(msynth->seq_client, &ev, 1, 0); + /* clear event and reset header */ + memset(&ev, 0, sizeof(ev)); } } } diff --git a/sound/core/seq/seq_midi_event.c b/sound/core/seq/seq_midi_event.c index 90bbbdbeba03..53c0dfab90d6 100644 --- a/sound/core/seq/seq_midi_event.c +++ b/sound/core/seq/seq_midi_event.c @@ -214,45 +214,17 @@ int snd_midi_event_resize_buffer(struct snd_midi_event *dev, int bufsize) } #endif /* 0 */

-/* - * read bytes and encode to sequencer event if finished - * return the size of encoded bytes - */ -long snd_midi_event_encode(struct snd_midi_event *dev, unsigned char *buf, long count, - struct snd_seq_event *ev) -{ - long result = 0; - int rc; - - ev->type = SNDRV_SEQ_EVENT_NONE; - - while (count-- > 0) { - rc = snd_midi_event_encode_byte(dev, *buf++, ev); - result++; - if (rc < 0) - return rc; - else if (rc > 0) - return result; - } - - return result; -} -EXPORT_SYMBOL(snd_midi_event_encode); - /* * read one byte and encode to sequencer event: - * return 1 if MIDI bytes are encoded to an event - * 0 data is not finished - * negative for error + * return true if MIDI bytes are encoded to an event + * false data is not finished */ -int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c, - struct snd_seq_event *ev) +bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, + struct snd_seq_event *ev) { - int rc = 0; + bool rc = false; unsigned long flags;

- c &= 0xff; - if (c >= MIDI_CMD_COMMON_CLOCK) { /* real-time event */ ev->type = status_event[ST_SPECIAL + c - 0xf0].event; @@ -293,7 +265,7 @@ int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c, status_event[dev->type].encode(dev, ev); if (dev->type >= ST_SPECIAL) dev->type = ST_INVALID; - rc = 1; + rc = true; } else if (dev->type == ST_SYSEX) { if (c == MIDI_CMD_COMMON_SYSEX_END || dev->read >= dev->bufsize) { @@ -306,7 +278,7 @@ int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c, dev->read = 0; /* continue to parse */ else reset_encode(dev); /* all parsed */ - rc = 1; + rc = true; } }

diff --git a/sound/core/seq/seq_virmidi.c b/sound/core/seq/seq_virmidi.c index 03ac5e72dbe6..0c84926eb726 100644 --- a/sound/core/seq/seq_virmidi.c +++ b/sound/core/seq/seq_virmidi.c @@ -174,8 +174,8 @@ static void snd_vmidi_output_work(struct work_struct *work) while (READ_ONCE(vmidi->trigger)) { if (snd_rawmidi_transmit(substream, &input, 1) != 1) break; - if (snd_midi_event_encode_byte(vmidi->parser, input, - &vmidi->event) <= 0) + if (!snd_midi_event_encode_byte(vmidi->parser, input, + &vmidi->event)) continue; if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { ret = snd_seq_kernel_client_dispatch(vmidi->client,

The sequencer core module doesn't call some destructors in the error path of the init code, which may leave some resources.

This patch mainly fix these leaks by calling the destructors appropriately at alsa_seq_init(). Also the patch brings a few cleanups along with it, namely:

- Expand the old "if ((err = xxx) < 0)" coding style - Get rid of empty seq_queue_init() and its caller - Change snd_seq_info_done() to void

Last but not least, a couple of functions lose __exit annotation since they are called also in alsa_seq_init().

No functional changes but minor code cleanups.

Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/core/seq/seq.c | 26 ++++++++++++++++---------- sound/core/seq/seq_clientmgr.c | 2 +- sound/core/seq/seq_info.c | 10 ++-------- sound/core/seq/seq_info.h | 6 +++--- sound/core/seq/seq_queue.c | 12 +----------- sound/core/seq/seq_queue.h | 3 --- 6 files changed, 23 insertions(+), 36 deletions(-)

diff --git a/sound/core/seq/seq.c b/sound/core/seq/seq.c index e685eccdc741..7de98d71f2aa 100644 --- a/sound/core/seq/seq.c +++ b/sound/core/seq/seq.c @@ -84,26 +84,32 @@ static int __init alsa_seq_init(void) { int err;

- if ((err = client_init_data()) < 0) - goto error; - - /* init event queues */ - if ((err = snd_seq_queues_init()) < 0) + err = client_init_data(); + if (err < 0) goto error;

/* register sequencer device */ - if ((err = snd_sequencer_device_init()) < 0) + err = snd_sequencer_device_init(); + if (err < 0) goto error;

/* register proc interface */ - if ((err = snd_seq_info_init()) < 0) - goto error; + err = snd_seq_info_init(); + if (err < 0) + goto error_device;

/* register our internal client */ - if ((err = snd_seq_system_client_init()) < 0) - goto error; + err = snd_seq_system_client_init(); + if (err < 0) + goto error_info;

snd_seq_autoload_init(); + return 0; + + error_info: + snd_seq_info_done(); + error_device: + snd_sequencer_device_done(); error: return err; } diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 6fd4b074b206..a0b768e2f697 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -2543,7 +2543,7 @@ int __init snd_sequencer_device_init(void) /* * unregister sequencer device */ -void __exit snd_sequencer_device_done(void) +void snd_sequencer_device_done(void) { snd_unregister_device(&seq_dev); put_device(&seq_dev); diff --git a/sound/core/seq/seq_info.c b/sound/core/seq/seq_info.c index 97015447b9b3..b27fedd435b6 100644 --- a/sound/core/seq/seq_info.c +++ b/sound/core/seq/seq_info.c @@ -50,7 +50,7 @@ create_info_entry(char *name, void (*read)(struct snd_info_entry *, return entry; }

-static void free_info_entries(void) +void snd_seq_info_done(void) { snd_info_free_entry(queues_entry); snd_info_free_entry(clients_entry); @@ -70,12 +70,6 @@ int __init snd_seq_info_init(void) return 0;

error: - free_info_entries(); + snd_seq_info_done(); return -ENOMEM; } - -int __exit snd_seq_info_done(void) -{ - free_info_entries(); - return 0; -} diff --git a/sound/core/seq/seq_info.h b/sound/core/seq/seq_info.h index f8549f81a645..2cdf8f6e63f5 100644 --- a/sound/core/seq/seq_info.h +++ b/sound/core/seq/seq_info.h @@ -30,11 +30,11 @@ void snd_seq_info_queues_read(struct snd_info_entry *entry, struct snd_info_buff

#ifdef CONFIG_SND_PROC_FS -int snd_seq_info_init( void ); -int snd_seq_info_done( void ); +int snd_seq_info_init(void); +void snd_seq_info_done(void); #else static inline int snd_seq_info_init(void) { return 0; } -static inline int snd_seq_info_done(void) { return 0; } +static inline void snd_seq_info_done(void) {} #endif

#endif diff --git a/sound/core/seq/seq_queue.c b/sound/core/seq/seq_queue.c index b377f5048352..3b3ac96f1f5f 100644 --- a/sound/core/seq/seq_queue.c +++ b/sound/core/seq/seq_queue.c @@ -159,18 +159,8 @@ static void queue_delete(struct snd_seq_queue *q)

/*----------------------------------------------------------------*/

-/* setup queues */ -int __init snd_seq_queues_init(void) -{ - /* - memset(queue_list, 0, sizeof(queue_list)); - num_queues = 0; - */ - return 0; -} - /* delete all existing queues */ -void __exit snd_seq_queues_delete(void) +void snd_seq_queues_delete(void) { int i;

diff --git a/sound/core/seq/seq_queue.h b/sound/core/seq/seq_queue.h index 719093489a2c..76db43b79a2b 100644 --- a/sound/core/seq/seq_queue.h +++ b/sound/core/seq/seq_queue.h @@ -63,9 +63,6 @@ struct snd_seq_queue { /* get the number of current queues */ int snd_seq_queue_get_cur_queues(void);

-/* init queues structure */ -int snd_seq_queues_init(void); - /* delete queues */ void snd_seq_queues_delete(void);

The old ugly macros remained in the code without usage. Rip them off.

Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/core/seq/seq_queue.h | 24 ------------------------ 1 file changed, 24 deletions(-)

diff --git a/sound/core/seq/seq_queue.h b/sound/core/seq/seq_queue.h index 76db43b79a2b..e006fc8e3a36 100644 --- a/sound/core/seq/seq_queue.h +++ b/sound/core/seq/seq_queue.h @@ -109,28 +109,4 @@ int snd_seq_queue_is_used(int queueid, int client);

int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop);

-/* - * 64bit division - for sync stuff.. - */ -#if defined(i386) || defined(i486) - -#define udiv_qrnnd(q, r, n1, n0, d) \ - __asm__ ("divl %4" \ - : "=a" ((u32)(q)), \ - "=d" ((u32)(r)) \ - : "0" ((u32)(n0)), \ - "1" ((u32)(n1)), \ - "rm" ((u32)(d))) - -#define u64_div(x,y,q) do {u32 __tmp; udiv_qrnnd(q, __tmp, (x)>>32, x, y);} while (0) -#define u64_mod(x,y,r) do {u32 __tmp; udiv_qrnnd(__tmp, q, (x)>>32, x, y);} while (0) -#define u64_divmod(x,y,q,r) udiv_qrnnd(q, r, (x)>>32, x, y) - -#else -#define u64_div(x,y,q) ((q) = (u32)((u64)(x) / (u64)(y))) -#define u64_mod(x,y,r) ((r) = (u32)((u64)(x) % (u64)(y))) -#define u64_divmod(x,y,q,r) (u64_div(x,y,q), u64_mod(x,y,r)) -#endif - - #endif