linux-kernel - [PATCH 4.5 060/128] clk: at91: fix check of clk

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Message-Id: <20160605222323.107869495@linuxfoundation.org>
Date:	Sun,  5 Jun 2016 15:23:35 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Vladimir Zapolskiy <vz@...ia.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Stephen Boyd <sboyd@...eaurora.org>
Subject: [PATCH 4.5 060/128] clk: at91: fix check of clk_register() returned value

4.5-stable review patch.  If anyone has any objections, please let me know.

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

From: Vladimir Zapolskiy <vz@...ia.com>

commit cb0ceaf77d93964a0d00477c79f4499123f6159c upstream.

The clk_register() function returns a valid pointer to struct clk or
ERR_PTR() error code, this makes a check for returned NULL value
useless and may lead to oops on error path.

Signed-off-by: Vladimir Zapolskiy <vz@...ia.com>
Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
Fixes: bcc5fd49a0fd ("clk: at91: add a driver for the h32mx clock")
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/clk/at91/clk-h32mx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clk/at91/clk-h32mx.c
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -116,7 +116,7 @@ void __init of_sama5d4_clk_h32mx_setup(s
 	h32mxclk->pmc = pmc;
 
 	clk = clk_register(NULL, &h32mxclk->hw);
-	if (!clk) {
+	if (IS_ERR(clk)) {
 		kfree(h32mxclk);
 		return;
 	}