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path: root/drivers/pci/setup-res.c
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Diffstat (limited to 'drivers/pci/setup-res.c')
-rw-r--r--drivers/pci/setup-res.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 43eda101fcf4..7f1acb3918d0 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -410,10 +410,16 @@ EXPORT_SYMBOL(pci_release_resource);
int pci_resize_resource(struct pci_dev *dev, int resno, int size)
{
struct resource *res = dev->resource + resno;
+ struct pci_host_bridge *host;
int old, ret;
u32 sizes;
u16 cmd;
+ /* Check if we must preserve the firmware's resource assignment */
+ host = pci_find_host_bridge(dev->bus);
+ if (host->preserve_config)
+ return -ENOTSUPP;
+
/* Make sure the resource isn't assigned before resizing it. */
if (!(res->flags & IORESOURCE_UNSET))
return -EBUSY;