linux-kernel - [PATCH 3/5] soundwire: bus: add more details to track failed transfers

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Date:   Fri, 15 Jan 2021 13:37:36 +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,
        hui.wang@...onical.com, pierre-louis.bossart@...ux.intel.com,
        sanyog.r.kale@...el.com, bard.liao@...el.com
Subject: [PATCH 3/5] soundwire: bus: add more details to track failed transfers

The current error log does not provide details on the type of
transfers and which address/count was requested. All this information
can help locate in which parts of the configuration process an error
occurred.

Co-developed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 drivers/soundwire/bus.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 3cc006bfae71..6e1c988f3845 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -267,8 +267,10 @@ static int sdw_transfer_unlocked(struct sdw_bus *bus, struct sdw_msg *msg)
 
 	ret = do_transfer(bus, msg);
 	if (ret != 0 && ret != -ENODATA)
-		dev_err(bus->dev, "trf on Slave %d failed:%d\n",
-			msg->dev_num, ret);
+		dev_err(bus->dev, "trf on Slave %d failed:%d %s addr %x count %d\n",
+			msg->dev_num, ret,
+			(msg->flags & SDW_MSG_FLAG_WRITE) ? "write" : "read",
+			msg->addr, msg->len);
 
 	if (msg->page)
 		sdw_reset_page(bus, msg->dev_num);
-- 
2.17.1