diff options
| -rw-r--r-- | drivers/pci/pci.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 812d4ac6bd2f..0d3326ddd5c1 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -373,8 +373,12 @@ pci_find_parent_resource(const struct pci_dev *dev, struct resource *res) continue; /* Wrong type */ if (!((res->flags ^ r->flags) & IORESOURCE_PREFETCH)) return r; /* Exact match */ - if ((res->flags & IORESOURCE_PREFETCH) && !(r->flags & IORESOURCE_PREFETCH)) - best = r; /* Approximating prefetchable by non-prefetchable */ + /* We can't insert a non-prefetch resource inside a prefetchable parent .. */ + if (r->flags & IORESOURCE_PREFETCH) + continue; + /* .. but we can put a prefetchable resource inside a non-prefetchable one */ + if (!best) + best = r; } return best; } |