linux-kernel - [PATCH 6/9] MIPS: BCM63XX: allow NULL clock for clk_get

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Message-Id: <20170718101730.2541-7-jonas.gorski@gmail.com>
Date:   Tue, 18 Jul 2017 12:17:27 +0200
From:   Jonas Gorski <jonas.gorski@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Ralf Baechle <ralf@...ux-mips.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        bcm-kernel-feedback-list@...adcom.com,
        James Hogan <james.hogan@...tec.com>,
        linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Subject: [PATCH 6/9] MIPS: BCM63XX: allow NULL clock for clk_get_rate

Make the behaviour of clk_get_rate consistent with common clk's
clk_get_rate by accepting NULL clocks as parameter. Some device
drivers rely on this, and will cause an OOPS otherwise.

Fixes: e7300d04bd08 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.")
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: bcm-kernel-feedback-list@...adcom.com
Cc: James Hogan <james.hogan@...tec.com>
Cc: linux-mips@...ux-mips.org
Cc: linux-kernel@...r.kernel.org
Reported-by: Mathias Kresin <dev@...sin.me>
Signed-off-by: Jonas Gorski <jonas.gorski@...il.com>
---
 arch/mips/bcm63xx/clk.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/bcm63xx/clk.c b/arch/mips/bcm63xx/clk.c
index 73626040e4d6..19577f771c1f 100644
--- a/arch/mips/bcm63xx/clk.c
+++ b/arch/mips/bcm63xx/clk.c
@@ -339,6 +339,9 @@ EXPORT_SYMBOL(clk_disable);
 
 unsigned long clk_get_rate(struct clk *clk)
 {
+	if (!clk)
+		return 0;
+
 	return clk->rate;
 }
 
-- 
2.11.0