ASoC: rsnd: ssi: fix race condition in rsnd_ssi_pointer_update

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Currently there is race condition between set of byte_pos and wrap
it around when new buffer starts. If .pointer is called in-between
it will result in inconsistent pointer position be returned
from .pointer callback.

This patch increments buffer pointer atomically to avoid this issue.

Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Reviewed-by: Takashi Sakamoto <takashi.sakamoto@miraclelinux.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Jiada Wang 2017-12-07 22:15:38 -08:00 • committed by Mark Brown

parent a91d7fb970

commit 33f801366b

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sound/soc/sh/rcar/ssi.c

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