Commit 17c34c56 authored Mar 21, 2017 by Peter De Schrijver Committed by Michael Turquette Apr 12, 2017

clk: aggregate return codes of notify chains

In case there are multiple notify chains for the same clocks (because they
were registered by different users), we need to propagate potential failure
of any single one of them to the caller. Otherwise we eg risk violating the
V/f curve when a notifier is used for DVFS.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>

parent 92031575

drivers/clk/clk.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -966,6 +966,8 @@ static int __clk_notify(struct clk_core *core, unsigned long msg,
		cnd.clk = cn->clk;
		ret = srcu_notifier_call_chain(&cn->notifier_head, msg,
		&cnd);
		if (ret & NOTIFY_STOP_MASK)
		return ret;
		}
		}