From 5afff8c1bbc7c5d9a092b217dd27040ccd5b347a Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 10 Dec 2019 07:34:10 +0100
Subject: [PATCH] ALSA: cs4281: Support PCM sync_stop
Git-commit: 5afff8c1bbc7c5d9a092b217dd27040ccd5b347a
Patch-mainline: v5.6-rc1
References: jsc#SLE-16518

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>

---
 sound/pci/cs4281.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/sound/pci/cs4281.c b/sound/pci/cs4281.c
index 0dcb2d15b560..e7294b9d2cb6 100644
--- 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;
 }
-- 
2.16.4