linux-kernel - [PATCH 01/25] clk: Fix debugfs clk_possible_parents for clks without parent string names

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Date:   Mon, 20 May 2019 16:03:57 +0800
From:   Chen-Yu Tsai <wens@...nel.org>
To:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     Chen-Yu Tsai <wens@...e.org>, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 01/25] clk: Fix debugfs clk_possible_parents for clks without parent string names

From: Chen-Yu Tsai <wens@...e.org>

Following the commit fc0c209c147f ("clk: Allow parents to be specified
without string names"), the parent name string is not always populated.

Instead, fetch the parents clk_core struct using the appropriate helper,
and read its name directly.

Fixes: fc0c209c147f ("clk: Allow parents to be specified without string names")
Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 drivers/clk/clk.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index aa51756fd4d6..bdb077ba59b9 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3000,12 +3000,16 @@ DEFINE_SHOW_ATTRIBUTE(clk_flags);
 static int possible_parents_show(struct seq_file *s, void *data)
 {
 	struct clk_core *core = s->private;
+	struct clk_core *parent;
 	int i;
 
-	for (i = 0; i < core->num_parents - 1; i++)
-		seq_printf(s, "%s ", core->parents[i].name);
+	for (i = 0; i < core->num_parents - 1; i++) {
+		parent = clk_core_get_parent_by_index(core, i);
+		seq_printf(s, "%s ", parent ? parent->name : NULL);
+	}
 
-	seq_printf(s, "%s\n", core->parents[i].name);
+	parent = clk_core_get_parent_by_index(core, i);
+	seq_printf(s, "%s", parent ? parent->name : NULL);
 
 	return 0;
 }
-- 
2.20.1