INTC issue

[Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>]

Hi,

I found INTC issue. For example, an interrupt is prohibited when I handle it as follows.

 1) Driver A call request_irq of DMAC ch0
 2) Driver B call request_irq of DMAC ch1.
 3) Driver A call free_irq of DMAC ch0.
 4) Driver B use DMAC ch1, but DMAC ch1 interrupt disabled.

The interrupt mask register of SH7785 is INT2MSKR.
The bit 11 of INT2MSKR is DMAC channels 0 to 5 interrupts mask bit.

I think that it is necessary to count the number of times admitted
an interrupt to solve this problem. I think that intc have a counter
every interrupt bit for a simple implementation method, but there
is much waste.

Any ideas?

Thanks,
Yoshihiro Shimoda