[PATCH v0 04/42] clk: renesas: Check notifier registration return value

Borislav Petkov
2021-11-08T10:12:19Z

From: Borislav Petkov <bp@suse.de>

Avoid homegrown notifier registration checks.

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-clk@vger.kernel.org
---
drivers/clk/renesas/clk-div6.c | 4 +++-
drivers/clk/renesas/rcar-cpg-lib.c | 4 +++-
2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/renesas/clk-div6.c b/drivers/clk/renesas/clk-div6.c
index 3abd6e5400ad..7d89ca01889a 100644
--- a/drivers/clk/renesas/clk-div6.c
+++ b/drivers/clk/renesas/clk-div6.c
@@ -306,7 +306,9 @@ struct clk * __init cpg_div6_register(const char *name,

if (notifiers) {
clock->nb.notifier_call = cpg_div6_clock_notifier_call;
- raw_notifier_chain_register(notifiers, &clock->nb);
+
+ if (raw_notifier_chain_register(notifiers, &clock->nb))
+ pr_warn("CPG DIV6 clock notifier already registered\n");
}

return clk;
diff --git a/drivers/clk/renesas/rcar-cpg-lib.c b/drivers/clk/renesas/rcar-cpg-lib.c
index e93f0011eb07..fbbb6f4a8148 100644
--- a/drivers/clk/renesas/rcar-cpg-lib.c
+++ b/drivers/clk/renesas/rcar-cpg-lib.c
@@ -59,7 +59,9 @@ void cpg_simple_notifier_register(struct raw_notifier_head *notifiers,
struct cpg_simple_notifier *csn)
{
csn->nb.notifier_call = cpg_simple_notifier_call;
- raw_notifier_chain_register(notifiers, &csn->nb);
+
+ if (raw_notifier_chain_register(notifiers, &csn->nb))
+ pr_warn("CPG notifier already registered\n");
}

/*
--
2.29.2