af9013: Checking for register accesses?

Hello,

I have looked at the implementations of functions like the following once more.
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/drivers/media/dvb-frontends/af9013.c?id=80c75a0f1d81922bf322c0634d1e1a15825a89e6#n124
* af9013_rd_regs
* af9013_wr_regs

Both functions will always return zero so far. Should they eventually forward an error code from other function calls?

Regards,
Markus