Hello, I have tried another small script out for the semantic patch language. This source code analysis approach points out that the function “clk_register_pll” is called by the function “_of_pll_clk_init”. https://elixir.bootlin.com/linux/v5.7-rc3/source/drivers/clk/keystone/pll.c#L153 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clk/keystone/pll.c?id=690e2aba7beb1ef06352803bea41a68a3c695015#n153 A null pointer check is performed at this place. The function “clk_register_pll” (from the same source file) can eventually return the pointer “ERR_PTR(-ENOMEM)”. Is there a need to take this special case also into account? Regards, Markus
