linux-kernel - [PATCH v4] ACPI / amba: Drop unnecessary check for registered amba_dummy

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Date: Mon, 24 Jun 2024 10:31:01 +0800
From: Youwan Wang <youwan@...china.com>
To: youwan@...china.com
Cc: guohanjun@...wei.com,
	lenb@...nel.org,
	linux-acpi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	lpieralisi@...nel.org,
	rafael@...nel.org,
	sudeep.holla@....com,
	catalin.marinas@....com,
	will@...nel.org
Subject: [PATCH v4] ACPI / amba: Drop unnecessary check for registered amba_dummy_clk

amba_register_dummy_clk() is called only once from acpi_amba_init()
and acpi_amba_init() itself is called once during the initialisation.
amba_dummy_clk can't be initialised before this in any other code
path and hence the check for already registered amba_dummy_clk is
not necessary. Drop the same.

Signed-off-by: Youwan Wang <youwan@...china.com>
Acked-by: Sudeep Holla <sudeep.holla@....com>
Acked-by: Hanjun Guo <guohanjun@...wei.com>
---
v1->v2->v3: Modify the commit log description
v3->v4: Update the commit message suggested by Sudeep;
        Add Acked-by from Sudeep;
        +Cc ARM64 maintainers Catalin and Will.
---
 drivers/acpi/arm64/amba.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/acpi/arm64/amba.c b/drivers/acpi/arm64/amba.c
index 60be8ee1dbdc..ef438417cc80 100644
--- a/drivers/acpi/arm64/amba.c
+++ b/drivers/acpi/arm64/amba.c
@@ -35,11 +35,7 @@ static const struct acpi_device_id amba_id_list[] = {
 
 static void amba_register_dummy_clk(void)
 {
-	static struct clk *amba_dummy_clk;
-
-	/* If clock already registered */
-	if (amba_dummy_clk)
-		return;
+	struct clk *amba_dummy_clk;
 
 	amba_dummy_clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 0);
 	clk_register_clkdev(amba_dummy_clk, "apb_pclk", NULL);
-- 
2.25.1