[ Upstream commit 12b90b40854a8461a02ef19f6f4474cc88d64b66 ] In case of error, the function clk_register() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Signed-off-by: Xu Wang <vulab@iscas.ac.cn> Link: https://lore.kernel.org/r/20200713032143.21362-1-vulab@iscas.ac.cn Acked-by: Barry Song <baohua@kernel.org> Fixes: 7bf21bc81f28 ("clk: sirf: re-arch to make the codes support both prima2 and atlas6") Signed-off-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>