[PATCH 4.18 075/135] ASoC: rsnd: adg: care clock-frequency size

Greg Kroah-Hartman
2018-10-16T17:13:41Z

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

[ Upstream commit 69235ccf491d2e26aefd465c0d3ccd1e3b2a9a9c ]

ADG has buffer over flow bug if DT has more than 3 clock-frequency.
This patch fixup this issue, and uses first 2 values.

clock-frequency = <x y>; /* this is OK */
clock-frequency = <x y z>; /* this is NG */

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/soc/sh/rcar/adg.c | 5 +++++
1 file changed, 5 insertions(+)

--- a/sound/soc/sh/rcar/adg.c
+++ b/sound/soc/sh/rcar/adg.c
@@ -465,6 +465,11 @@ static void rsnd_adg_get_clkout(struct r
goto rsnd_adg_get_clkout_end;

req_size = prop->length / sizeof(u32);
+ if (req_size > REQ_SIZE) {
+ dev_err(dev,
+ "too many clock-frequency, use top %d\n", REQ_SIZE);
+ req_size = REQ_SIZE;
+ }

of_property_read_u32_array(np, "clock-frequency", req_rate, req_size);
req_48kHz_rate = 0;