[PATCH 5.7 172/204] net: qcom/emac: add missed clk_disable_unprepare in error path of emac_clks_phase1_init

Greg Kroah-Hartman
2020-08-20T09:44:36Z

From: Wang Hai <wanghai38@huawei.com>

[ Upstream commit 50caa777a3a24d7027748e96265728ce748b41ef ]

Fix the missing clk_disable_unprepare() before return
from emac_clks_phase1_init() in the error handling case.

Fixes: b9b17debc69d ("net: emac: emac gigabit ethernet controller driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Acked-by: Timur Tabi <timur@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/qualcomm/emac/emac.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c
index 18b0c7a2d6dcb..90e794c79f667 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac.c
@@ -473,13 +473,24 @@ static int emac_clks_phase1_init(struct platform_device *pdev,

ret = clk_prepare_enable(adpt->clk[EMAC_CLK_CFG_AHB]);
if (ret)
- return ret;
+ goto disable_clk_axi;

ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 19200000);
if (ret)
- return ret;
+ goto disable_clk_cfg_ahb;
+
+ ret = clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]);
+ if (ret)
+ goto disable_clk_cfg_ahb;

- return clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]);
+ return 0;
+
+disable_clk_cfg_ahb:
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_CFG_AHB]);
+disable_clk_axi:
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_AXI]);
+
+ return ret;
}

/* Enable clocks; needs emac_clks_phase1_init to be called before */
--
2.25.1