[PATCH 1/9] ARM: ep93xx: allow NULL clock for clk_get_rate
Jonas Gorski
jonas.gorski at gmail.com
Tue Jul 18 03:17:22 PDT 2017
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: 1d81eedb8f6c ("[ARM] 3634/1: ep93xx: initial implementation of the clk_* API")
Cc: Hartley Sweeten <hsweeten at visionengravers.com>
Cc: Alexander Sverdlin <alexander.sverdlin at gmail.com>
Cc: Russell King <linux at armlinux.org.uk>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Reported-by: Mathias Kresin <dev at kresin.me>
Signed-off-by: Jonas Gorski <jonas.gorski at gmail.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 39ef3b613912..f0768befafe8 100644
--- a/arch/arm/mach-ep93xx/clock.c
+++ b/arch/arm/mach-ep93xx/clock.c
@@ -316,6 +316,9 @@ 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);
--
2.11.0
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