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clk: Get new parent freq after set_freq

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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
This commit is contained in:
Emmanuel Vadot 2018-01-20 14:47:27 +00:00
parent ad2c142415
commit 2b541904af
1 changed files with 8 additions and 0 deletions
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8
sys/dev/extres/clk/clk.c
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@ -916,6 +916,14 @@ clknode_set_freq(struct clknode *clknode, uint64_t freq, int flags,
/* 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) {