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 rx->regmap will be error pointer and be used in rx_macro_mclk_enable(). Therefore, it should be better to check it in order to avoid the dereference of the error pointer.

Fixes: af3d54b99764 ("ASoC: codecs: lpass-rx-macro: add support for lpass rx macro") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn --- sound/soc/codecs/lpass-rx-macro.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/sound/soc/codecs/lpass-rx-macro.c b/sound/soc/codecs/lpass-rx-macro.c index 07894ec5e7a6..2adbf2e2697f 100644 --- a/sound/soc/codecs/lpass-rx-macro.c +++ b/sound/soc/codecs/lpass-rx-macro.c @@ -3542,6 +3542,8 @@ static int rx_macro_probe(struct platform_device *pdev) return PTR_ERR(base);

rx->regmap = devm_regmap_init_mmio(dev, base, &rx_regmap_config); + if (IS_ERR(rx->regmap)) + return PTR_ERR(rx->regmap);

dev_set_drvdata(dev, rx);