[PATCH] ASoC: sun4i-spdif: Add missing check for devm_regmap_init_mmio

[Chen Ni]

Add check for the return value of devm_regmap_init_mmio() and return the
error if it fails in order to catch the error.

Signed-off-by: Chen Ni <nichen at iscas.ac.cn>
---
 sound/soc/sunxi/sun4i-spdif.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/sunxi/sun4i-spdif.c b/sound/soc/sunxi/sun4i-spdif.c
index 1e755a716c63..65de03ca3ad2 100644
--- a/sound/soc/sunxi/sun4i-spdif.c
+++ b/sound/soc/sunxi/sun4i-spdif.c
@@ -684,6 +684,10 @@ static int sun4i_spdif_probe(struct platform_device *pdev)
 
 	host->regmap = devm_regmap_init_mmio(&pdev->dev, base,
 						&sun4i_spdif_regmap_config);
+	if (IS_ERR(host->regmap)) {
+		dev_err(&pdev->dev, "failed to initialise regmap.\n");
+		return PTR_ERR(host->regmap);
+	}
 
 	/* Clocks */
 	host->apb_clk = devm_clk_get(&pdev->dev, "apb");
-- 
2.25.1