linux-kernel - [PATCH v4 1/2] clk: at91: fix clk-generated parenting

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Date:   Fri, 12 May 2017 16:25:30 +0200
From:   Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:     Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCH v4 1/2] clk: at91: fix clk-generated parenting

clk_generated_startup is called after clk_hw_register. So the first call to
get_parent will not have the correct value (i.e. 0) and because this is
cached, it may never be updated.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
 drivers/clk/at91/clk-generated.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
index 4e1cd5aa69d8..70474bd97a10 100644
--- a/drivers/clk/at91/clk-generated.c
+++ b/drivers/clk/at91/clk-generated.c
@@ -260,13 +260,12 @@ at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock,
 	gck->lock = lock;
 	gck->range = *range;
 
+	clk_generated_startup(gck);
 	hw = &gck->hw;
 	ret = clk_hw_register(NULL, &gck->hw);
 	if (ret) {
 		kfree(gck);
 		hw = ERR_PTR(ret);
-	} else
-		clk_generated_startup(gck);
 
 	return hw;
 }
-- 
2.11.0