Author: manu
Date: Sat Jan 20 14:47:27 2018
New Revision: 328198
URL: https://svnweb.freebsd.org/changeset/base/328198
Log:
clk: Get new parent freq after set_freq
During set_freq a clknode might have reparent (using a better parent that
have a higher frequency for example), before refreshing the cache, re-get
the parent frequency.
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 Sat Jan 20 14:05:55 2018
(r328197)
+++ head/sys/dev/extres/clk/clk.c Sat Jan 20 14:47:27 2018
(r328198)
@@ -916,6 +916,14 @@ clknode_set_freq(struct clknode *clknode, uint64_t fre
/* Success - invalidate frequency cache for all children. */
if ((flags & CLK_SET_DRYRUN) == 0) {
clknode->freq = freq;
+ /* Clock might have reparent during set_freq */
+ if (clknode->parent_cnt > 0) {
+ rv = clknode_get_freq(clknode->parent,
+ &parent_freq);
+ if (rv != 0) {
+ return (rv);
+ }
+ }
clknode_refresh_cache(clknode, parent_freq);
}
} else if (clknode->parent != NULL) {
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