linux-kernel - [PATCH] soundwire: bus: add better dev

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Date:   Tue, 26 Jan 2021 16:54:02 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org
Cc:     vinod.koul@...aro.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, jank@...ence.com,
        srinivas.kandagatla@...aro.org, rander.wang@...ux.intel.com,
        ranjani.sridharan@...ux.intel.com, hui.wang@...onical.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        bard.liao@...el.com
Subject: [PATCH] soundwire: bus: add better dev_dbg to track complete() calls

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

Add a dev_dbg() log for both enumeration and initialization completion
to better track suspend-resume issues.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Rander Wang <rander.wang@...el.com>
Reviewed-by: Chao Song <chao.song@...el.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 drivers/soundwire/bus.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 6e1c988f3845..82df088c9333 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -784,7 +784,7 @@ static void sdw_modify_slave_status(struct sdw_slave *slave,
 
 	if (status == SDW_SLAVE_UNATTACHED) {
 		dev_dbg(&slave->dev,
-			"%s: initializing completion for Slave %d\n",
+			"%s: initializing enumeration and init completion for Slave %d\n",
 			__func__, slave->dev_num);
 
 		init_completion(&slave->enumeration_complete);
@@ -793,7 +793,7 @@ static void sdw_modify_slave_status(struct sdw_slave *slave,
 	} else if ((status == SDW_SLAVE_ATTACHED) &&
 		   (slave->status == SDW_SLAVE_UNATTACHED)) {
 		dev_dbg(&slave->dev,
-			"%s: signaling completion for Slave %d\n",
+			"%s: signaling enumeration completion for Slave %d\n",
 			__func__, slave->dev_num);
 
 		complete(&slave->enumeration_complete);
@@ -1758,8 +1758,13 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
 		if (ret)
 			dev_err(slave->bus->dev,
 				"Update Slave status failed:%d\n", ret);
-		if (attached_initializing)
+		if (attached_initializing) {
+			dev_dbg(&slave->dev,
+				"%s: signaling initialization completion for Slave %d\n",
+				__func__, slave->dev_num);
+
 			complete(&slave->initialization_complete);
+		}
 	}
 
 	return ret;
-- 
2.17.1