Messages in this thread | | | Subject | Re: [PATCH 1/2] clk: clk_core_get() can also return NULL | From | Stephen Boyd <> | Date | Thu, 09 Dec 2021 17:15:56 -0800 |
| |
Quoting Stephen Boyd (2021-12-07 20:15:33) > Nothing stops a clk controller from registering an OF clk provider > before registering those clks with the clk framework. This is not great > but we deal with it in the clk framework by refusing to hand out struct > clk pointers when 'hw->core' is NULL, the indication that clk_register() > has been called. > > Within clk_core_fill_parent_index() we considered this case when a > clk_hw pointer is referenced directly by filling in the parent cache > with an -EPROBE_DEFER pointer when the core pointer is NULL. When we > lookup a parent with clk_core_get() we don't care about the return value > being NULL though, because that was considered largely impossible, but > it's been proven now that it can be NULL if two clk providers are > probing in parallel and the parent provider has been registered before > the clk has. Let's check for NULL here as well and treat it the same as > direct clk_hw references. > > Signed-off-by: Stephen Boyd <sboyd@kernel.org> > ---
Applied to clk-next
| |