From 61c7dbec33777ade95d3db58beec8d7f177868c8 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Thu, 17 Dec 2020 11:28:49 +0900
Subject: [PATCH] ASoC: rsnd: don't call clk_disable_unprepare() if can't use
Git-commit: 61c7dbec33777ade95d3db58beec8d7f177868c8
Patch-mainline: v5.11-rc4
References: git-fixes
We need to care clock accessibility,
because we might can't use clock for some reasons.
It sets clk_rate for each clocks when enabled.
This means it doesn't have clk_rate if we can't use.
We can avoid to call clk_disable_unprepare() in such case.
Link: https://lore.kernel.org/r/CAMuHMdWvB+p=2JqTsO7bR8uJqKqO5A2XgXFXsVAjHk3hcxgcTw@mail.gmail.com
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/87eejpgoi9.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
sound/soc/sh/rcar/adg.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c
index b9aacf3d3b29..abdfd9cf91e2 100644
--- a/sound/soc/sh/rcar/adg.c
+++ b/sound/soc/sh/rcar/adg.c
@@ -366,25 +366,27 @@ void rsnd_adg_clk_control(struct rsnd_priv *priv, int enable)
struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
struct device *dev = rsnd_priv_to_dev(priv);
struct clk *clk;
- int i, ret;
+ int i;
for_each_rsnd_clk(clk, adg, i) {
- ret = 0;
if (enable) {
- ret = clk_prepare_enable(clk);
+ int ret = clk_prepare_enable(clk);
/*
* We shouldn't use clk_get_rate() under
* atomic context. Let's keep it when
* rsnd_adg_clk_enable() was called
*/
- adg->clk_rate[i] = clk_get_rate(adg->clk[i]);
+ adg->clk_rate[i] = 0;
+ if (ret < 0)
+ dev_warn(dev, "can't use clk %d\n", i);
+ else
+ adg->clk_rate[i] = clk_get_rate(clk);
} else {
- clk_disable_unprepare(clk);
+ if (adg->clk_rate[i])
+ clk_disable_unprepare(clk);
+ adg->clk_rate[i] = 0;
}
-
- if (ret < 0)
- dev_warn(dev, "can't use clk %d\n", i);
}
}
--
2.26.2