net: stmmac: Fix return value check in qcom_ethqos_probe()
In case of error, the function devm_clk_get() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: a7c30e62 ("net: stmmac: Add driver for Qualcomm ethqos") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Vinod Koul <vkoul@kernel.org> Acked-by: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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