[PATCH v5 14/23] PCI: Fix assigning the fixed prefetchable resources

[Sergey Miroshnichenko]

Allow matching IORESOURCE_PCI_FIXED prefetchable BARs to non-prefetchable
windows, so they follow the same rules as immovable BARs.

Signed-off-by: Sergey Miroshnichenko <s.miroshnichenko at yadro.com>
---
 drivers/pci/setup-bus.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 586aaa9578b2..6f12411357f3 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1340,15 +1340,20 @@ static void assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r)
 {
 	int i;
 	struct resource *parent_r;
-	unsigned long mask = IORESOURCE_IO | IORESOURCE_MEM |
-			     IORESOURCE_PREFETCH;
+	unsigned long mask = IORESOURCE_TYPE_BITS;
 
 	pci_bus_for_each_resource(b, parent_r, i) {
 		if (!parent_r)
 			continue;
 
-		if ((r->flags & mask) == (parent_r->flags & mask) &&
-		    resource_contains(parent_r, r))
+		if ((r->flags & mask) != (parent_r->flags & mask))
+			continue;
+
+		if (parent_r->flags & IORESOURCE_PREFETCH &&
+		    !(r->flags & IORESOURCE_PREFETCH))
+			continue;
+
+		if (resource_contains(parent_r, r))
 			request_resource(parent_r, r);
 	}
 }
-- 
2.21.0