[PATCH] ASoC: tegra: Fix MBDRC bypass mode check

[Sameer Pujar <spujar@nvidia.com>]

MBDRC supports different modes of operation. There is no configuration
required for bypass mode. The hw_params() call does not filter bypass
mode correctly and it leads to following Smatch static checker warning:

  sound/soc/tegra/tegra210_mbdrc.c:778 tegra210_mbdrc_hw_params()
  warn: bitwise AND condition is false here

Fix this condition by using proper mode mask and just return for bypass
mode.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 7358a803c778 ("ASoC: tegra: Add Tegra210 based OPE driver")
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
---
 sound/soc/tegra/tegra210_mbdrc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/tegra/tegra210_mbdrc.c b/sound/soc/tegra/tegra210_mbdrc.c
index 7d9da33..d786daa 100644
--- a/sound/soc/tegra/tegra210_mbdrc.c
+++ b/sound/soc/tegra/tegra210_mbdrc.c
@@ -775,7 +775,9 @@ int tegra210_mbdrc_hw_params(struct snd_soc_component *cmpnt)
 
 	regmap_read(ope->mbdrc_regmap, TEGRA210_MBDRC_CFG, &val);
 
-	if (val & TEGRA210_MBDRC_CFG_MBDRC_MODE_BYPASS)
+	val &= TEGRA210_MBDRC_CFG_MBDRC_MODE_MASK;
+
+	if (val == TEGRA210_MBDRC_CFG_MBDRC_MODE_BYPASS)
 		return 0;
 
 	for (i = 0; i < MBDRC_NUM_BAND; i++) {
-- 
2.7.4