Re: [BUG](-mm)pci_disable_device function clear bars_enabled element

Rajesh Shah
2006-06-01T09:49:13Z

On Thu, Jun 01, 2006 at 03:05:50PM +0800, bibo,mao wrote:
> I found that in -mm tree, function pci_disable_device()
> clears bars_enabled variable, so that pci_release_regions
> can not release reserved PCI I/O and memory resource. Some
> device driver programs in kernel tree call pci_release_regions
> function after pci_disable_device(), that will cause some problem.

It's coming from Kaneshige-san's patch:
pci-legacy-i-o-port-free-driver-changes-to-generic-pci-code.patch

This patch assumes that pci_request_region() will always be called
after pci_enable_device() and pci_release_region() will always
be called before pci_disable_device(). We cannot make this
assumption,since it's perfectly legal to disable a device
first and then release it's regions. So, I think that patch
needs to change.

thanks,
Rajesh