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PCI: Use res->parent to check if resource is assigned

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reassign_resources_sorted() uses resource_size() to select between
pci_assign_resource() and pci_reassign_resource(). Due to twisted way
bridge window sizing in pbus_size_mem() sets resource sizes to 0, it works
to match into IOV resources but that is going to be changed by an upcoming
change.

Replace resource_size() check with res->parent check that is the true
dividing line in between whether assign or reassign function should be used
for the resource.

Link: https://lore.kernel.org/r/20241216175632.4175-24-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Xiaochun Lee <lixc17@lenovo.com>
This commit is contained in:
Ilpo Järvinen
2024-12-16 19:56:30 +02:00
committed by Bjorn Helgaas
parent 8884b5637b
commit e89df6d2be
1 changed files with 1 additions and 1 deletions
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drivers/pci/setup-bus.c
+1 -1
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@@ -271,7 +271,7 @@ static void reassign_resources_sorted(struct list_head *realloc_head,
res_name = pci_resource_name(dev, idx);
add_size = add_res->add_size;
align = add_res->min_align;
if (!resource_size(res)) {
if (!res->parent) {
resource_set_range(res, align, add_size);
if (pci_assign_resource(dev, idx)) {
pci_dbg(dev,