From 631896f7eaaf8cf8c639b065d3c9fbaa66da5d32 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 27 Feb 2024 09:52:43 +0100 Subject: ALSA: ump: Use guard() for locking We can simplify the code gracefully with new guard() macro and co for automatic cleanup of locks. Only the code refactoring, and no functional changes. Signed-off-by: Takashi Iwai Link: https://lore.kernel.org/r/20240227085306.9764-2-tiwai@suse.de --- sound/core/ump.c | 35 ++++++++++++----------------------- 1 file changed, 12 insertions(+), 23 deletions(-) (limited to 'sound') diff --git a/sound/core/ump.c b/sound/core/ump.c index fe7911498cc43..fd6a68a542788 100644 --- a/sound/core/ump.c +++ b/sound/core/ump.c @@ -985,13 +985,11 @@ static int snd_ump_legacy_open(struct snd_rawmidi_substream *substream) struct snd_ump_endpoint *ump = substream->rmidi->private_data; int dir = substream->stream; int group = ump->legacy_mapping[substream->number]; - int err = 0; + int err; - mutex_lock(&ump->open_mutex); - if (ump->legacy_substreams[dir][group]) { - err = -EBUSY; - goto unlock; - } + guard(mutex)(&ump->open_mutex); + if (ump->legacy_substreams[dir][group]) + return -EBUSY; if (dir == SNDRV_RAWMIDI_STREAM_OUTPUT) { if (!ump->legacy_out_opens) { err = snd_rawmidi_kernel_open(&ump->core, 0, @@ -999,17 +997,14 @@ static int snd_ump_legacy_open(struct snd_rawmidi_substream *substream) SNDRV_RAWMIDI_LFLG_APPEND, &ump->legacy_out_rfile); if (err < 0) - goto unlock; + return err; } ump->legacy_out_opens++; snd_ump_convert_reset(&ump->out_cvts[group]); } - spin_lock_irq(&ump->legacy_locks[dir]); + guard(spinlock_irq)(&ump->legacy_locks[dir]); ump->legacy_substreams[dir][group] = substream; - spin_unlock_irq(&ump->legacy_locks[dir]); - unlock: - mutex_unlock(&ump->open_mutex); - return err; + return 0; } static int snd_ump_legacy_close(struct snd_rawmidi_substream *substream) @@ -1018,15 +1013,13 @@ static int snd_ump_legacy_close(struct snd_rawmidi_substream *substream) int dir = substream->stream; int group = ump->legacy_mapping[substream->number]; - mutex_lock(&ump->open_mutex); - spin_lock_irq(&ump->legacy_locks[dir]); - ump->legacy_substreams[dir][group] = NULL; - spin_unlock_irq(&ump->legacy_locks[dir]); + guard(mutex)(&ump->open_mutex); + scoped_guard(spinlock_irq, &ump->legacy_locks[dir]) + ump->legacy_substreams[dir][group] = NULL; if (dir == SNDRV_RAWMIDI_STREAM_OUTPUT) { if (!--ump->legacy_out_opens) snd_rawmidi_kernel_release(&ump->legacy_out_rfile); } - mutex_unlock(&ump->open_mutex); return 0; } @@ -1078,12 +1071,11 @@ static int process_legacy_output(struct snd_ump_endpoint *ump, const int dir = SNDRV_RAWMIDI_STREAM_OUTPUT; unsigned char c; int group, size = 0; - unsigned long flags; if (!ump->out_cvts || !ump->legacy_out_opens) return 0; - spin_lock_irqsave(&ump->legacy_locks[dir], flags); + guard(spinlock_irqsave)(&ump->legacy_locks[dir]); for (group = 0; group < SNDRV_UMP_MAX_GROUPS; group++) { substream = ump->legacy_substreams[dir][group]; if (!substream) @@ -1099,7 +1091,6 @@ static int process_legacy_output(struct snd_ump_endpoint *ump, break; } } - spin_unlock_irqrestore(&ump->legacy_locks[dir], flags); return size; } @@ -1109,18 +1100,16 @@ static void process_legacy_input(struct snd_ump_endpoint *ump, const u32 *src, struct snd_rawmidi_substream *substream; unsigned char buf[16]; unsigned char group; - unsigned long flags; const int dir = SNDRV_RAWMIDI_STREAM_INPUT; int size; size = snd_ump_convert_from_ump(src, buf, &group); if (size <= 0) return; - spin_lock_irqsave(&ump->legacy_locks[dir], flags); + guard(spinlock_irqsave)(&ump->legacy_locks[dir]); substream = ump->legacy_substreams[dir][group]; if (substream) snd_rawmidi_receive(substream, buf, size); - spin_unlock_irqrestore(&ump->legacy_locks[dir], flags); } /* Fill ump->legacy_mapping[] for groups to be used for legacy rawmidi */ -- cgit 1.2.3-korg