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x86/PCI: Fix infinite loop in search for 64bit BAR placement 

Break the loop if we can't find some address space for a 64bit BAR.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Christian König 2017-11-29 15:12:27 +01:00 committed by Bjorn Helgaas
parent 7912af5c83
commit 470195f82e
1 changed files with 6 additions and 1 deletions
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7
arch/x86/pci/fixup.c
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@ -696,8 +696,13 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
res->end = 0xfd00000000ull - 1;
/* Just grab the free area behind system memory for this */
while ((conflict = request_resource_conflict(&iomem_resource, res)))
while ((conflict = request_resource_conflict(&iomem_resource, res))) {
if (conflict->end >= res->end) {
kfree(res);
return;
}
res->start = conflict->end + 1;
}
dev_info(&dev->dev, "adding root bus resource %pR\n", res);