From 5e0890c1cb7dbcb9779fb664e8f3c579911c9283 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 10 Dec 2019 07:34:13 +0100
Subject: [PATCH] ALSA: ctxfi: Support PCM sync_stop
Git-commit: 5e0890c1cb7dbcb9779fb664e8f3c579911c9283
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/20191210063454.31603-15-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/pci/ctxfi/cthw20k1.c | 4 +---
 sound/pci/ctxfi/cthw20k2.c | 1 +
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/sound/pci/ctxfi/cthw20k1.c b/sound/pci/ctxfi/cthw20k1.c
index 4ff7ecd92709..6e3177bcc709 100644
--- a/sound/pci/ctxfi/cthw20k1.c
+++ b/sound/pci/ctxfi/cthw20k1.c
@@ -1937,6 +1937,7 @@ static int hw_card_start(struct hw *hw)
 			goto error2;
 		}
 		hw->irq = pci->irq;
+		hw->card->sync_irq = hw->irq;
 	}
 
 	pci_set_master(pci);
@@ -1962,9 +1963,6 @@ static int hw_card_stop(struct hw *hw)
 	data = hw_read_20kx(hw, PLLCTL);
 	hw_write_20kx(hw, PLLCTL, (data & (~(0x0F<<12))));
 
-	/* TODO: Disable interrupt and so on... */
-	if (hw->irq >= 0)
-		synchronize_irq(hw->irq);
 	return 0;
 }
 
diff --git a/sound/pci/ctxfi/cthw20k2.c b/sound/pci/ctxfi/cthw20k2.c
index 3cd4b7dad945..ce44cbe6459f 100644
--- a/sound/pci/ctxfi/cthw20k2.c
+++ b/sound/pci/ctxfi/cthw20k2.c
@@ -2061,6 +2061,7 @@ static int hw_card_start(struct hw *hw)
 			goto error2;
 		}
 		hw->irq = pci->irq;
+		hw->card->sync_irq = hw->irq;
 	}
 
 	pci_set_master(pci);
-- 
2.16.4