[alsa-devel] [PATCH] hda: warn on spurious response

[Wu Fengguang]

To help disclose hardware bugs.

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

--- sound-2.6.orig/sound/pci/hda/hda_intel.c
+++ sound-2.6/sound/pci/hda/hda_intel.c
@@ -639,7 +639,11 @@ static void azx_update_rirb(struct azx *
 			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]);
 	}
 }