[PATCH 1/9] ARM: ep93xx: allow NULL clock for clk_get_rate
From: alexander.sverdlin@gmail.com (Alexander Sverdlin)
Date: 2017-07-19 05:04:47
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On 18/07/17 12:17, Jonas Gorski wrote:
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@visionengravers.com>
Cc: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Reported-by: Mathias Kresin <redacted>
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
quoted hunk ↗ jump to hunk
--- 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);