[alsa-devel] [PATCH 3/4] ALSA: hda: Log HDA Hardware related errors

[Sriram Periyasamy]

From: Pardha Saradhi K <pardha.saradhi.kesapragada at intel.com>

Detect the timeout while modifying HDA DMA related Registers
for stream reset and print them to console for user information

Signed-off-by: Pardha Saradhi K <pardha.saradhi.kesapragada at intel.com>
Signed-off-by: Sriram Periyasamy <sriramx.periyasamy at intel.com>
---
 sound/hda/hdac_stream.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index 33c8ced528f6..aa8a2884289f 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -144,6 +144,10 @@ void snd_hdac_stream_reset(struct hdac_stream *azx_dev)
 		if (val)
 			break;
 	} while (--timeout);
+
+	if (!timeout)
+		dev_err(azx_dev->bus->dev, "timeout on stream reset entry\n");
+
 	val &= ~SD_CTL_STREAM_RESET;
 	snd_hdac_stream_writeb(azx_dev, SD_CTL, val);
 	udelay(3);
@@ -157,6 +161,9 @@ void snd_hdac_stream_reset(struct hdac_stream *azx_dev)
 			break;
 	} while (--timeout);
 
+	if (!timeout)
+		dev_err(azx_dev->bus->dev, "timeout on stream reset exit\n");
+
 	/* reset first position - may not be synced with hw at this time */
 	if (azx_dev->posbuf)
 		*azx_dev->posbuf = 0;
-- 
2.7.4