linux-kernel - [PATCH 3.16 081/370] clk: clk-wm831x: fix a logic error

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Date:   Fri, 10 Mar 2017 11:46:22 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Stephen Boyd" <sboyd@...eaurora.org>,
        "Charles Keepax" <ckeepax@...nsource.wolfsonmicro.com>,
        "Pan Bian" <bianpan2016@....com>
Subject: [PATCH 3.16 081/370] clk: clk-wm831x: fix a logic error

3.16.42-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Pan Bian <bianpan2016@....com>

commit 20979202ee6e4c68dab7bcf408787225a656d18e upstream.

Fix bug https://bugzilla.kernel.org/show_bug.cgi?id=188561. Function
wm831x_clkout_is_prepared() returns "true" when it fails to read
CLOCK_CONTROL_1. "true" means the device is already prepared. So
return "true" on the read failure seems improper.

Signed-off-by: Pan Bian <bianpan2016@....com>
Acked-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Fixes: f05259a6ffa4 ("clk: wm831x: Add initial WM831x clock driver")
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/clk/clk-wm831x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clk/clk-wm831x.c
+++ b/drivers/clk/clk-wm831x.c
@@ -248,7 +248,7 @@ static int wm831x_clkout_is_prepared(str
 	if (ret < 0) {
 		dev_err(wm831x->dev, "Unable to read CLOCK_CONTROL_1: %d\n",
 			ret);
-		return true;
+		return false;
 	}
 
 	return (ret & WM831X_CLKOUT_ENA) != 0;