Hi Shimoda-san,

> This code could not resolve my concern. This code still read
> CTL_IRQ_MASK at first. So, if the register value is incorrect
> (when "host->reset" didn't exist), the sdcard_irq_mask value
> will be not expected value.

Geez, I forgot (again) that SD_RESET will not reset the irq register :(
I will initialize the register and the cache variable in reset() and
will resend in a few minutes after the tests.

Thanks!

   Wolfram