From da0f0b2c3ad2ad9533c8c5cae84ad88d57a5e8dc Mon Sep 17 00:00:00 2001 From: Tomasz Figa Date: Sun, 29 Sep 2013 02:37:16 +0200 Subject: [PATCH] clk: Correct lookup logic in clk_fetch_parent_index() This function is supposed to iterate over all parents of given child clock to find the index of given parent clock in its parent list, using parent cache if possible and falling back to string compare otherwise. However currently the logic falls back to string compare in every iteration in which clock cache entry does not match given parent, due to wrong check conditions. This patch corrects the logic to continue the loop if parent cache entry is present and does not match requested parent clock. In addition, redundant checks for parent cache array presence are removed, because it is always allocated in the beginning of the function. Signed-off-by: Tomasz Figa Signed-off-by: Mike Turquette --- drivers/clk/clk.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 63f9ac1..32e2fed 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1097,11 +1097,14 @@ static int clk_fetch_parent_index(struct clk *clk, struct clk *parent) * them now to avoid future calls to __clk_lookup. */ for (i = 0; i < clk->num_parents; i++) { - if (clk->parents && clk->parents[i] == parent) + if (clk->parents[i] == parent) return i; - else if (!strcmp(clk->parent_names[i], parent->name)) { - if (clk->parents) - clk->parents[i] = __clk_lookup(parent->name); + + if (clk->parents[i]) + continue; + + if (!strcmp(clk->parent_names[i], parent->name)) { + clk->parents[i] = __clk_lookup(parent->name); return i; } } -- 2.7.4