The devm_regmap_init_mmio() may return error pointer under certain circumstances, for example the possible failure of the kzalloc() in regmap_mmio_gen_context(), which is called by devm_regmap_init_mmio(). Then the tx->regmap will be error pointer and be used in tx_macro_mclk_enable(). Therefore, it should be better to check it in order to avoid the dereference of the error pointer.
Fixes: c39667ddcfc5 ("ASoC: codecs: lpass-tx-macro: add support for lpass tx macro") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn --- sound/soc/codecs/lpass-tx-macro.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c index 27a0d5defd27..e4bbc6bd4925 100644 --- a/sound/soc/codecs/lpass-tx-macro.c +++ b/sound/soc/codecs/lpass-tx-macro.c @@ -1803,6 +1803,8 @@ static int tx_macro_probe(struct platform_device *pdev) return PTR_ERR(base);
tx->regmap = devm_regmap_init_mmio(dev, base, &tx_regmap_config); + if (IS_ERR(tx->regmap)) + return PTR_ERR(tx->regmap);
dev_set_drvdata(dev, tx);