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authorTakashi Iwai <tiwai@suse.de>2019-11-17 09:53:07 +0100
committerTakashi Iwai <tiwai@suse.de>2019-11-20 19:39:54 +0100
commitfabb26dcd104027b971c018275fe40f2ebe09ae3 (patch)
treef6428eb1cdc7dbfa009e7d0bb684b0407b491307 /sound/core
parent1e850beea2781d30418743dd99250291cef37919 (diff)
downloadlinux-fabb26dcd104027b971c018275fe40f2ebe09ae3.tar.bz2
ALSA: pcm: Add card sync_irq field
Many PCI and other drivers performs snd_pcm_period_elapsed() simply in its interrupt handler, so the sync_stop operation is just to call synchronize_irq(). Instead of putting this call multiple times, introduce the common card->sync_irq field. When this field is set, PCM core performs synchronize_irq() for sync-stop operation. Each driver just needs to copy its local IRQ number to card->sync_irq, and that's all we need. Link: https://lore.kernel.org/r/20191117085308.23915-8-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/init.c1
-rw-r--r--sound/core/pcm_native.c2
2 files changed, 3 insertions, 0 deletions
diff --git a/sound/core/init.c b/sound/core/init.c
index db99b7fad6ad..faa9f03c01ca 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -215,6 +215,7 @@ int snd_card_new(struct device *parent, int idx, const char *xid,
init_waitqueue_head(&card->power_sleep);
#endif
init_waitqueue_head(&card->remove_sleep);
+ card->sync_irq = -1;
device_initialize(&card->card_dev);
card->card_dev.parent = parent;
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 163d621ff238..1fe581167b7b 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -574,6 +574,8 @@ static void snd_pcm_sync_stop(struct snd_pcm_substream *substream)
substream->runtime->stop_operating = false;
if (substream->ops->sync_stop)
substream->ops->sync_stop(substream);
+ else if (substream->pcm->card->sync_irq > 0)
+ synchronize_irq(substream->pcm->card->sync_irq);
}
}