[PATCH v2] ASoC: codecs: Check for error pointer after calling devm_regmap_init_mmio

[Mark Brown]

On Fri, Jan 14, 2022 at 02:57:13PM +0800, Jiasheng Jiang wrote:
> Since the possible failure of the devm_regmap_init_mmio(), it will
> return error pointer and be assigned to the regmap.
> Then the error pointer will be dereferenced.
> For example rx->regmap will be used in rx_macro_mclk_enable().
> Therefore, it should be better to check it.

This doesn't apply against current code, please check and resend.
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