[PATCH 4.9 50/96] net: stmmac: dwmac-rk: fix error handling in rk_gmac_powerup()

Greg Kroah-Hartman
2019-03-12T17:26:40Z

[ Upstream commit c69c29a1a0a8f68cd87e98ba4a5a79fb8ef2a58c ]

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>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index d80c88bd2bba..6e61bccc90b3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -877,8 +877,10 @@ static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
}

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)
--
2.19.1