ASoC: soc-pcm: do not hw_free BE if it's still used
ASoC: soc-pcm: do not hw_free BE if it's still used

Do not free BE hw if it's still used by other FE during dpcm runtime
shutdown. Otherwise the BE runtime state will be STATE_HW_FREE and
won't be updated to STATE_CLOSE when shutdown ends, because BE dai
shutdown function won't close pcm when detecting BE is still under
use. With STATE_HW_FREE, BE can't be triggered start again.

This corner case can easily appear when one BE is used by two FE,
without this patch "ASoC: dpcm: Fix race between FE/BE updates and
trigger"(ea9d0d771fcd32cd56070819749477d511ec9117). One FE tries to
shutdown but it's raced against xrun on another FE. It improves the
be dai hw_free logic.

Signed-off-by: Qiao Zhou <50a4e6fe771972bee9e282d96184a32f17fd4b37@marvell.com>
Acked-by: Liam Girdwood <1c687ae09fa7f11acd34075a0ae6b39df2be9341@linux.intel.com>
Signed-off-by: Mark Brown <b51b9a92386687a9ac927cebfa0f978adeb8cea5@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs