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SubjectRe: [PATCH v10 4/4] PCI: Allow extend_bridge_window() to shrink resource if necessary
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On Wed, Oct 30, 2019 at 03:49:39PM +0200, mika.westerberg@linux.intel.com wrote:
> On Wed, Oct 30, 2019 at 01:33:26PM +0000, Nicholas Johnson wrote:
> > On Wed, Oct 30, 2019 at 03:25:09PM +0200, mika.westerberg@linux.intel.com wrote:
> > > On Wed, Oct 30, 2019 at 12:47:44PM +0000, Nicholas Johnson wrote:
> > > > Remove checks for resource size in extend_bridge_window(). This is
> > > > necessary to allow the pci_bus_distribute_available_resources() to
> > > > function when the kernel parameter pci=hpmemsize=nn[KMG] is used to
> > > > allocate resources. Because the kernel parameter sets the size of all
> > > > hotplug bridges to be the same, there are problems when nested hotplug
> > > > bridges are encountered. Fitting a downstream hotplug bridge with size X
> > > > and normal bridges with non-zero size Y into parent hotplug bridge with
> > > > size X is impossible, and hence the downstream hotplug bridge needs to
> > > > shrink to fit into its parent.
> > > >
> > > > Add check for if bridge is extended or shrunken and adjust pci_dbg to
> > > > reflect this.
> > > >
> > > > Reset the resource if its new size is zero (if we have run out of a
> > > > bridge window resource) to prevent the PCI resource assignment code from
> > > > attempting to assign a zero-sized resource.
> > > >
> > > > Rename extend_bridge_window() to adjust_bridge_window() to reflect the
> > > > fact that the window can now shrink.
> > > >
> > > > Signed-off-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
> > >
> > > Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> > Do I need to re-post with this line in it?
>
> No. Typically maintainers add these when they apply the patch.
Cheers, only 1/4 (the biggest one) is left to review. I will try to post
the patch for the bugfix again soon, also.

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