ASoC: rsnd: don't call clk_get_rate() under atomic context
authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tue, 6 Aug 2019 03:45:38 +0000 (12:45 +0900)
committerMark Brown <broonie@kernel.org>
Wed, 7 Aug 2019 13:17:47 +0000 (14:17 +0100)
commit06e8f5c842f2dbb232897ba967ea7b422745c271
tree212e88aa7cab3d6ce770563c0a8876fbed777e0a
parent7c0767643f3b6b0dd2cda923ae37a18590d431cf
ASoC: rsnd: don't call clk_get_rate() under atomic context

ADG is using clk_get_rate() under atomic context, thus, we might
have scheduling issue.
To avoid this issue, we need to get/keep clk rate under
non atomic context.

We need to handle ADG as special device at Renesas Sound driver.
From SW point of view, we want to impletent it as
rsnd_mod_ops :: prepare, but it makes code just complicate.

To avoid complicated code/patch, this patch adds new clk_rate[] array,
and keep clk IN rate when rsnd_adg_clk_enable() was called.

Reported-by: Leon Kong <Leon.KONG@cn.bosch.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Leon Kong <Leon.KONG@cn.bosch.com>
Link: https://lore.kernel.org/r/87v9vb0xkp.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
sound/soc/sh/rcar/adg.c