On Tue, Jun 13, 2023 at 09:45:11AM +0200, Takashi Iwai wrote: > regcache_maple_sync() tries to sync all cached values no matter > whether it's writable or not. OTOH, regache_sync_val() does care the > wrtability and returns -EIO for a read-only register. This results in > an error message like: > snd_hda_codec_realtek hdaudioC0D0: Unable to sync register 0x2f0009. -5 > and the sync loop is aborted incompletely. > > This patch adds the writable register check in the loop for addressing > the bug. This should be in _needs_sync().
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