linux-kernel - [PATCH 7/9] MIPS: Loongson 2F: allow NULL clock for clk_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20170718101730.2541-8-jonas.gorski@gmail.com>
Date:   Tue, 18 Jul 2017 12:17:28 +0200
From:   Jonas Gorski <jonas.gorski@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 7/9] MIPS: Loongson 2F: 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, as some device
drivers rely on this.

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: f8ede0f700f5 ("MIPS: Loongson 2F: Add CPU frequency scaling support")
Cc: Ralf Baechle <ralf@...ux-mips.org>
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/loongson64/lemote-2f/clock.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/loongson64/lemote-2f/clock.c b/arch/mips/loongson64/lemote-2f/clock.c
index a78fb657068c..8281334df9c8 100644
--- a/arch/mips/loongson64/lemote-2f/clock.c
+++ b/arch/mips/loongson64/lemote-2f/clock.c
@@ -80,6 +80,9 @@ EXPORT_SYMBOL(clk_disable);
 
 unsigned long clk_get_rate(struct clk *clk)
 {
+	if (!clk)
+		return 0;
+
 	return (unsigned long)clk->rate;
 }
 EXPORT_SYMBOL(clk_get_rate);
-- 
2.11.0