netdev - [PATCH net] net: dsa: felix: ignore pending status of TAS module when it's disabled

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Message-Id: <20240904102722.45427-1-xiaoliang.yang_1@nxp.com>
Date: Wed,  4 Sep 2024 18:27:22 +0800
From: Xiaoliang Yang <xiaoliang.yang_1@....com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	vladimir.oltean@....com,
	claudiu.manoil@....com,
	alexandre.belloni@...tlin.com,
	UNGLinuxDriver@...rochip.com,
	andrew@...n.ch,
	f.fainelli@...il.com,
	michael@...le.cc,
	linux-kernel@...r.kernel.org,
	xiaoliang.yang_1@....com
Subject: [PATCH net] net: dsa: felix: ignore pending status of TAS module when it's disabled

The TAS module could not be configured when it's running in pending
status. We need disable the module and configure it again. However, the
pending status is not cleared after the module disabled. So we don't
need to check the pending status if TAS module is disabled.

Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@....com>
---
 drivers/net/dsa/ocelot/felix_vsc9959.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
index ba37a566da39..ecfa73725d25 100644
--- a/drivers/net/dsa/ocelot/felix_vsc9959.c
+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
@@ -1474,10 +1474,13 @@ static int vsc9959_qos_port_tas_set(struct ocelot *ocelot, int port,
 	/* Hardware errata -  Admin config could not be overwritten if
 	 * config is pending, need reset the TAS module
 	 */
-	val = ocelot_read(ocelot, QSYS_PARAM_STATUS_REG_8);
-	if (val & QSYS_PARAM_STATUS_REG_8_CONFIG_PENDING) {
-		ret = -EBUSY;
-		goto err_reset_tc;
+	val = ocelot_read_rix(ocelot, QSYS_TAG_CONFIG, port);
+	if (val & QSYS_TAG_CONFIG_ENABLE) {
+		val = ocelot_read(ocelot, QSYS_PARAM_STATUS_REG_8);
+		if (val & QSYS_PARAM_STATUS_REG_8_CONFIG_PENDING) {
+			ret = -EBUSY;
+			goto err_reset_tc;
+		}
 	}
 
 	ocelot_rmw_rix(ocelot,
-- 
2.17.1