From: Anirudh Rayabharam <mail@xxxxxxxxxxxxx> commit 0c32a96d000f260b5ebfabb4145a86ae1cd71847 upstream. In case clk_prepare() fails, capture and propagate the error code up the stack. If regulator_enable() was called earlier, properly unwind it by calling regulator_disable(). Signed-off-by: Anirudh Rayabharam <mail@xxxxxxxxxxxxx> Cc: David S. Miller <davem@xxxxxxxxxxxxx> Cc: stable <stable@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20210503115736.2104747-22-gregkh@xxxxxxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/stmicro/stmmac/dwmac-sunxi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sunxi.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sunxi.c @@ -39,7 +39,7 @@ struct sunxi_priv_data { static int sun7i_gmac_init(struct platform_device *pdev, void *priv) { struct sunxi_priv_data *gmac = priv; - int ret; + int ret = 0; if (gmac->regulator) { ret = regulator_enable(gmac->regulator); @@ -59,10 +59,12 @@ static int sun7i_gmac_init(struct platfo gmac->clk_enabled = 1; } else { clk_set_rate(gmac->tx_clk, SUN7I_GMAC_MII_RATE); - clk_prepare(gmac->tx_clk); + ret = clk_prepare(gmac->tx_clk); + if (ret && gmac->regulator) + regulator_disable(gmac->regulator); } - return 0; + return ret; } static void sun7i_gmac_exit(struct platform_device *pdev, void *priv)
