[PATCH 6/7] pci: allow for overriding the list of advertised BAR sizes

[Darren Salt]

This is intended for devices which are known to work with BAR sizes other
than those which they advertise; usually larger.
---
 drivers/pci/setup-res.c | 4 ++--
 include/linux/pci.h     | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 43eda101fcf4..3651754de433 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -407,7 +407,7 @@ void pci_release_resource(struct pci_dev *dev, int resno)
 }
 EXPORT_SYMBOL(pci_release_resource);
 
-int pci_resize_resource(struct pci_dev *dev, int resno, int size)
+int pci_resize_resource(struct pci_dev *dev, int resno, int size, bool forced)
 {
 	struct resource *res = dev->resource + resno;
 	int old, ret;
@@ -426,7 +426,7 @@ int pci_resize_resource(struct pci_dev *dev, int resno, int size)
 	if (!sizes)
 		return -ENOTSUPP;
 
-	if (!(sizes & BIT(size)))
+	if (!forced && !(sizes & BIT(size)))
 		return -EINVAL;
 
 	old = pci_rebar_get_current_size(dev, resno);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 5eee18969fe8..f33494d92512 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1238,7 +1238,7 @@ static __always_inline u64 pci_rebar_size_to_bytes(int size)
 }
 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
-int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
+int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size, bool forced);
 
 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
 bool pci_device_is_present(struct pci_dev *pdev);
-- 
2.20.1