net: ethernet: dwmac: remove redundant null check before clk_disable_unprepare()

Because clk_prepare_enable() and clk_disable_unprepare() already checked
NULL clock parameter, so the additional checks are unnecessary, just
remove them.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
index 3c5df5e..efef547 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
@@ -129,8 +129,7 @@ static void imx_dwmac_exit(struct platform_device *pdev, void *priv)
 {
        struct imx_priv_data *dwmac = priv;
 
-       if (dwmac->clk_tx)
-               clk_disable_unprepare(dwmac->clk_tx);
+       clk_disable_unprepare(dwmac->clk_tx);
        clk_disable_unprepare(dwmac->clk_mem);
 }