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SubjectRe: ISA DMA controller hangs
On Thu, Jun 16, 2005 at 05:53:47PM +0200, Pierre Ossman wrote:
> So how do we solve this problem? We should do a master clear and then
> enable channel 4 after a suspend. The question is where. I see three
> possible places:
> * In the suspend code in kernel/power.
> * In the driver actually handling the suspend (ACPI/APM/etc.).
> * Via the device layer by adding a device for the DMA controller.
> Which would be the preferred solution?

Shouldn't there be a system device for the DMA controller? I think
that should have appropriate hooks into the power management system
to do the necessary magic to restore whatever's needed - just like
we do for the PIC.

Russell King
Linux kernel 2.6 ARM Linux -
maintainer of: 2.6 Serial core
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