[PATCH v3] soundwire: bus: demote UNATTACHED slave warnings to dev_dbg

[Cole Leavitt]

The dev_warn() messages in sdw_handle_slave_status() for UNATTACHED
transitions were added in commit d1b328557058 ("soundwire: bus: add
dev_warn() messages to track UNATTACHED devices") to debug attachment
failures with dynamic debug enabled.

These warnings fire during normal operation -- for example when a codec
driver triggers a system reset after firmware download, or during
initial multi-device enumeration due to the PING frame race documented
in cadence_master.c -- producing misleading noise on every boot.

The original debugging use case is fully served by dev_dbg(), which
remains visible when dynamic debug is enabled.  Demote both state
check warnings to dev_dbg().

Fixes: d1b328557058 ("soundwire: bus: add dev_warn() messages to track UNATTACHED devices")
Signed-off-by: Cole Leavitt <cole@xxxxxxxxx>
---
Changes in v3:
 - Add Fixes tag and version changelog

Changes in v2:
 - Drop unattach_pending flag approach entirely per reviewer feedback
   (Pierre-Louis, Richard, Charles)
 - Simply demote dev_warn() to dev_dbg() unconditionally
 - Single patch instead of 2-patch series

 drivers/soundwire/bus.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index fb68738dfb9b..45234cc07f35 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -1899,8 +1899,8 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
 
 		if (status[i] == SDW_SLAVE_UNATTACHED &&
 		    slave->status != SDW_SLAVE_UNATTACHED) {
-			dev_warn(&slave->dev, "Slave %d state check1: UNATTACHED, status was %d\n",
-				 i, slave->status);
+			dev_dbg(&slave->dev, "Slave %d state check1: UNATTACHED, status was %d\n",
+				i, slave->status);
 			sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED);
 
 			/* Ensure driver knows that peripheral unattached */
@@ -1951,8 +1951,8 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
 			if (slave->status == SDW_SLAVE_UNATTACHED)
 				break;
 
-			dev_warn(&slave->dev, "Slave %d state check2: UNATTACHED, status was %d\n",
-				 i, slave->status);
+			dev_dbg(&slave->dev, "Slave %d state check2: UNATTACHED, status was %d\n",
+				i, slave->status);
 
 			sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED);
 			break;
-- 
2.52.0