Re: pci_mapreg_map() with disabled device

["Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>]

On Thu, Dec 01, 2011 at 10:12:44AM +0100, Frank Wille wrote:
> Is there a reason why pci_mapreg_map() calls bus_space_map() for a memory
> or i/o space, even when all spaces have been disabled on the device?

Not necessarily, on x86 it's not uncommon for the I/O or Memory enable
bit to be set wrong by the firmware, even sometimes when the firmware
has allocated resources to the BARs.

> Wouldn't it be better to check whether a space is enabled in the device,
> before trying to map it?

You mean we don't anymore?  I thought that didn't change.

        Jonathan Kollasch