[PATCH v2] net: ethernet: arc: fix error handling in emac_rockchip_probe
From: Branislav Radocaj <hidden>
Date: 2017-12-09 11:53:50
If clk_set_rate() fails, we should disable clk before return. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Branislav Radocaj <redacted> --- Changes since v2: * Improved inconsistent failure handling of clock rate setting * For completeness of usecase, added arc_emac_probe error handling --- drivers/net/ethernet/arc/emac_rockchip.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/arc/emac_rockchip.c b/drivers/net/ethernet/arc/emac_rockchip.c
index e278e3d96ee0..16f9bee992fe 100644
--- a/drivers/net/ethernet/arc/emac_rockchip.c
+++ b/drivers/net/ethernet/arc/emac_rockchip.c@@ -199,9 +199,11 @@ static int emac_rockchip_probe(struct platform_device *pdev) /* RMII interface needs always a rate of 50MHz */ err = clk_set_rate(priv->refclk, 50000000); - if (err) + if (err) { dev_err(dev, "failed to change reference clock rate (%d)\n", err); + goto out_regulator_disable; + } if (priv->soc_data->need_div_macclk) { priv->macclk = devm_clk_get(dev, "macclk");
@@ -220,19 +222,24 @@ static int emac_rockchip_probe(struct platform_device *pdev) /* RMII TX/RX needs always a rate of 25MHz */ err = clk_set_rate(priv->macclk, 25000000); - if (err) + if (err) { dev_err(dev, "failed to change mac clock rate (%d)\n", err); + goto out_clk_disable_macclk; + } } err = arc_emac_probe(ndev, interface); if (err) { dev_err(dev, "failed to probe arc emac (%d)\n", err); - goto out_regulator_disable; + goto out_clk_disable_macclk; } return 0; +out_clk_disable_macclk: + if (priv->soc_data->need_div_macclk) + clk_disable_unprepare(priv->macclk); out_regulator_disable: if (priv->regulator) regulator_disable(priv->regulator);
--
2.11.0