ALSA: cs4281: Support PCM sync_stop

The driver invokes snd_pcm_period_elapsed() simply from the interrupt
handler.  Set card->sync_irq for enabling the missing sync_stop PCM
operation, as well as removing the superfluous synchronize_irq()
call.

Link: https://lore.kernel.org/r/20191210063454.31603-12-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/cs4281.c b/sound/pci/cs4281.c
index 0dcb2d1..e7294b9 100644 (file)
--- a/sound/pci/cs4281.c
+++ b/sound/pci/cs4281.c
@@ -1268,9 +1268,6 @@ static int snd_cs4281_free(struct cs4281 *chip)
 {
        snd_cs4281_free_gameport(chip);
 
-       if (chip->irq >= 0)
-               synchronize_irq(chip->irq);
-
        /* Mask interrupts */
        snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff);
        /* Stop the DLL Clock logic. */
@@ -1352,6 +1349,7 @@ static int snd_cs4281_create(struct snd_card *card,
                return -ENOMEM;
        }
        chip->irq = pci->irq;
+       card->sync_irq = chip->irq;
 
        tmp = snd_cs4281_chip_init(chip);
        if (tmp) {
@@ -1600,7 +1598,6 @@ static int snd_cs4281_chip_init(struct cs4281 *chip)
                                        BA0_HISR_DMA(1) |
                                        BA0_HISR_DMA(2) |
                                        BA0_HISR_DMA(3)));
-       synchronize_irq(chip->irq);
 
        return 0;
 }