[PATCH 1/3] clk: ignore of_device_ensure_probed error in clock lookup

Lucas Stach dev at lynxeye.de
Sun Jan 16 13:32:19 PST 2022

For CLK_OF_DECLARE clocks there is no driver that is bound to the device,
so the lookup fails before even trying to find the provider, breaking
the parent_ready() logic used when initializing the declared providers.

Ignore the return code from of_device_ensure_probed to allow the lookup
to proceed as usual. If of_device_ensure_probed the lookup will also fail,
as no provider will be found.

Signed-off-by: Lucas Stach <dev at lynxeye.de>
 drivers/clk/clk.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 189c9c62df5c..a1d1d7f1a467 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -643,11 +643,9 @@ struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec)
 	struct of_clk_provider *provider;
 	struct clk *clk = ERR_PTR(-EPROBE_DEFER);
-	int ret;
-	ret = of_device_ensure_probed(clkspec->np);
-	if (ret)
-		return ERR_PTR(ret);
+	/* Ignore error, as CLK_OF_DECLARE clocks have no proper driver. */
+	of_device_ensure_probed(clkspec->np);
 	/* Check if we have such a provider in our array */
 	list_for_each_entry(provider, &of_clk_providers, link) {

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