From e310bb0646e57a4f9182865115c5780931456c65 Mon Sep 17 00:00:00 2001
From: Wu Fengguang <fengguang.wu@intel.com>
Date: Sat, 1 Aug 2009 19:18:45 +0800
Subject: ALSA: hda: warn on spurious response

To help disclose hardware bugs.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/hda_intel.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 7c43f92..175f07a 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -632,7 +632,11 @@ static void azx_update_rirb(struct azx *chip)
 			chip->rirb.res[addr] = res;
 			smp_wmb();
 			chip->rirb.cmds[addr]--;
-		}
+		} else
+			snd_printk(KERN_ERR SFX "spurious response %#x:%#x, "
+				   "last cmd=%#08x\n",
+				   res, res_ex,
+				   chip->last_cmd[addr]);
 	}
 }
 
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