[PATCH kernel v2] powerpc/pci/of: Parse unassigned resources
patch-notifications at ellerman.id.au
Mon Jul 8 11:19:43 AEST 2019
On Wed, 2019-06-26 at 02:37:46 UTC, Alexey Kardashevskiy wrote:
> The pseries platform uses the PCI_PROBE_DEVTREE method of PCI probing
> which reads "assigned-addresses" of every PCI device and initializes
> the device resources. However if the property is missing or zero sized,
> then there is no fallback of any kind and the PCI resources remain
> undiscovered, i.e. pdev->resource array remains empty.
> This adds a fallback which parses the "reg" property in pretty much same
> way except it marks resources as "unset" which later make Linux assign
> those resources proper addresses.
> This has an effect when:
> 1. a hypervisor failed to assign any resource for a device;
> 2. /chosen/linux,pci-probe-only=0 is in the DT so the system may try
> assigning a resource.
> Neither is likely to happen under PowerVM.
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
Applied to powerpc next, thanks.
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