From 5e13cf6cd64c6a4c15a4426e6f1683093a495d9a Mon Sep 17 00:00:00 2001
From: Bard Liao <yung-chuan.liao@linux.intel.com>
Date: Mon, 27 May 2019 00:58:35 +0800
Subject: [PATCH] ALSA: hda: add polling mode in snd_hdac_bus_get_response

Polling mode is useful if a machine somehow missed an expected IRQ.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/hda/hdac_controller.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index b2e9454f5816..a16ac31bda83 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -239,6 +239,8 @@ int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 	timeout = jiffies + msecs_to_jiffies(1000);
 
 	for (loopcounter = 0;; loopcounter++) {
+		if (bus->polling_mode)
+			snd_hdac_bus_update_rirb(bus);
 		spin_lock_irq(&bus->reg_lock);
 		if (!bus->rirb.cmds[addr]) {
 			if (res)