From: Wang Qing <wangqing@vivo.com>
To: Hartley Sweeten <hsweeten@visionengravers.com>,
Alexander Sverdlin <alexander.sverdlin@gmail.com>,
Russell King <linux@armlinux.org.uk>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Wang Qing <wangqing@vivo.com>
Subject: [PATCH] arm: Add clk_get_rate input parameter null check
Date: Fri, 6 Nov 2020 09:46:15 +0800 [thread overview]
Message-ID: <1604627175-16710-1-git-send-email-wangqing@vivo.com> (raw)
The input parameter of clk_get_rate() is checked with IS_ERR(),
so here we need to check null on clk.
Signed-off-by: Wang Qing <wangqing@vivo.com>
---
arch/arm/mach-ep93xx/clock.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c
index 2810eb5..4313b2f
--- a/arch/arm/mach-ep93xx/clock.c
+++ b/arch/arm/mach-ep93xx/clock.c
@@ -321,6 +321,9 @@ static unsigned long get_uart_rate(struct clk *clk)
unsigned long clk_get_rate(struct clk *clk)
{
+ if (!clk)
+ return 0;
+
if (clk->get_rate)
return clk->get_rate(clk);
--
2.7.4
next reply other threads:[~2020-11-06 1:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-06 1:46 Wang Qing [this message]
2020-11-06 5:57 ` [PATCH] arm: Add clk_get_rate input parameter null check Alexander Sverdlin
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