Author: kan
Date: Sun Mar 27 23:19:20 2016
New Revision: 297328
URL: https://svnweb.freebsd.org/changeset/base/297328
Log:
Do nothing if requested clk frequency is already correct.
Reviewed by: mmel
Modified:
head/sys/dev/extres/clk/clk.c
Modified: head/sys/dev/extres/clk/clk.c
==============================================================================
--- head/sys/dev/extres/clk/clk.c Sun Mar 27 23:19:14 2016
(r297327)
+++ head/sys/dev/extres/clk/clk.c Sun Mar 27 23:19:20 2016
(r297328)
@@ -818,6 +818,10 @@ clknode_set_freq(struct clknode *clknode
/* We have exclusive topology lock, node lock is not needed. */
CLK_TOPO_XASSERT();
+ /* Check for no change */
+ if (clknode->freq == freq)
+ return (0);
+
parent_freq = 0;
/*
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