Re: [PATCH v4 3/5] PCI: Handle IORESOURCE_PCI_FIXED when sizing and assigning resources.
From: Yinghai Lu <yinghai@kernel.org>
Date: 2015-10-02 23:14:11
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linux-pci, lkml
On Fri, Oct 2, 2015 at 3:37 PM, David Daney [off-list ref] wrote:
From: David Daney <redacted> The new Enhanced Allocation (EA) capability support creates resources with the IORESOURCE_PCI_FIXED set. This creates a couple of problems: 1) Since these resources cannot be relocated or resized, their alignment is not really defined, and it is therefore not specified. This causes a problem in pbus_size_mem() where resources with unspecified alignment are disabled. 2) During resource assignment in pci_bus_assign_resources(), IORESOURCE_PCI_FIXED resources are not given a parent. This, in turn, causes pci_enable_resources() to fail with a "not claimed" error. So, in pbus_size_mem() skip IORESOURCE_PCI_FIXED resources, instead of disabling them. In __pci_bus_assign_resources(), for IORESOURCE_PCI_FIXED resources, try to request the resource from a parent bus.
Can you check if https://patchwork.kernel.org/patch/7304971/ [v6,05/53] PCI: Don't release fixed resource for realloc https://patchwork.kernel.org/patch/7304371/ [v6,06/53] PCI: Claim fixed resource during remove/rescan path address the the problem that you met? Yinghai