[PATCH net-next 2/2] net: bcmgenet: Support calling set_pauseparam from panic context

[Florian Fainelli <florian.fainelli@broadcom.com>]

Avoid making sleeping calls that would not be able to complete the MMIO
writes ignoring pause frame reception and generation at the Ethernet MAC
controller level.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
 drivers/net/ethernet/broadcom/genet/bcmmii.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index 38f854b94a79..de7156b5ecf7 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -75,7 +75,8 @@ static void bcmgenet_mac_config(struct net_device *dev)
 	reg |= RGMII_LINK;
 	bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL);
 
-	spin_lock_bh(&priv->reg_lock);
+	if (!panic_in_progress())
+		spin_lock_bh(&priv->reg_lock);
 	reg = bcmgenet_umac_readl(priv, UMAC_CMD);
 	reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
 		       CMD_HD_EN |
@@ -88,7 +89,8 @@ static void bcmgenet_mac_config(struct net_device *dev)
 		reg |= CMD_TX_EN | CMD_RX_EN;
 	}
 	bcmgenet_umac_writel(priv, reg, UMAC_CMD);
-	spin_unlock_bh(&priv->reg_lock);
+	if (!panic_in_progress())
+		spin_unlock_bh(&priv->reg_lock);
 
 	active = phy_init_eee(phydev, 0) >= 0;
 	bcmgenet_eee_enable_set(dev,
@@ -139,7 +141,8 @@ void bcmgenet_phy_pause_set(struct net_device *dev, bool rx, bool tx)
 	linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->advertising, rx);
 	linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->advertising,
 			 rx | tx);
-	phy_start_aneg(phydev);
+	if (!panic_in_progress())
+		phy_start_aneg(phydev);
 
 	mutex_lock(&phydev->lock);
 	if (phydev->link)
-- 
2.34.1