net: stmmac: dwmac-rk: fix error handling in rk_gmac_powerup()

BugLink: https://bugs.launchpad.net/bugs/1822271

[ Upstream commit c69c29a1 ]

If phy_power_on() fails in rk_gmac_powerup(), clocks are left enabled.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c

@@ -535,8 +535,10 @@ static int rk_gmac_init(struct platform_device *pdev, void *priv)
 	int ret;
 
 	ret = phy_power_on(bsp_priv, true);
-	if (ret)
+	if (ret) {
+		gmac_clk_enable(bsp_priv, false);
 		return ret;
+	}
 
 	ret = gmac_clk_enable(bsp_priv, true);
 	if (ret)