[SRU][F:linux-bluefield][PATCH v2 1/1] UBUNTU: SAUCE: mlxbf_gige: clear valid_polarity upon open

[David Thompson]

BugLink: https://bugs.launchpad.net/bugs/1942932

This patch ensures that the driver's valid_polarity
is cleared during the open() method so that it always
matches the receive polarity used by hardware.

Reviewed-by: Asmaa Mnebhi <asmaa at nvidia.com>
Signed-off-by: David Thompson <davthompson at nvidia.com>
---
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
index 7caa1ca4461f..4ba0b0951ba2 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
@@ -148,6 +148,13 @@ static int mlxbf_gige_open(struct net_device *netdev)
 	err = mlxbf_gige_clean_port(priv);
 	if (err)
 		goto free_irqs;
+
+	/* Clear driver's valid_polarity to match hardware,
+	 * since the above call to clean_port() resets the
+	 * receive polarity used by hardware.
+	 */
+	priv->valid_polarity = 0;
+
 	err = mlxbf_gige_rx_init(priv);
 	if (err)
 		goto free_irqs;
-- 
2.30.1