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Date:   Sat, 2 May 2020 18:48:16 +0200
From:   Markus Elfring <>
        Michael Turquette <>,
        Santosh Shilimkar <>,
        Stephen Boyd <>
Cc:     LKML <>,
Subject: clk: keystone: Clarification for a return value check in


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”.

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?


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