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m68k: allow NULL clock for clk_get_rate

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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: facdf0ed4f59 ("m68knommu: introduce basic clk infrastructure")
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-kernel@vger.kernel.org
Reported-by: Mathias Kresin <dev@kresin.me>
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
This commit is contained in:
Jonas Gorski 2017-07-18 12:17:25 +02:00 committed by Greg Ungerer
parent cc4a41fe55
commit 94b282267c
1 changed files with 3 additions and 0 deletions
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3
arch/m68k/coldfire/clk.c
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@ -121,6 +121,9 @@ EXPORT_SYMBOL(clk_put);
unsigned long clk_get_rate(struct clk *clk) unsigned long clk_get_rate(struct clk *clk)
{ {
if (!clk)
return 0;
return clk->rate; return clk->rate;
} }
EXPORT_SYMBOL(clk_get_rate); EXPORT_SYMBOL(clk_get_rate);