of/pci: Fix the conversion of IO ranges into IO resources

The ranges property for a host bridge controller in DT describes the
mapping between the PCI bus address and the CPU physical address.  The
resources framework however expects that the IO resources start at a pseudo
"port" address 0 (zero) and have a maximum size of IO_SPACE_LIMIT.  The
conversion from PCI ranges to resources failed to take that into account,
returning a CPU physical address instead of a port number.

Also fix all the drivers that depend on the old behaviour by fetching the
CPU physical address based on the port number where it is being needed.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Simon Horman <horms@verge.net.au>
CC: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/include/linux/of_address.h b/include/linux/of_address.h
index a38e1c846c23..8cb14eb393d6 100644
--- a/include/linux/of_address.h
+++ b/include/linux/of_address.h
@@ -134,9 +134,9 @@ extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
 			       u64 *size, unsigned int *flags);
 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
 				      struct resource *r);
-extern void of_pci_range_to_resource(struct of_pci_range *range,
-				     struct device_node *np,
-				     struct resource *res);
+extern int of_pci_range_to_resource(struct of_pci_range *range,
+				    struct device_node *np,
+				    struct resource *res);
 #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
 				             struct resource *r)
@@ -149,9 +149,9 @@ static inline const __be32 *of_get_pci_address(struct device_node *dev,
 {
 	return NULL;
 }
-static inline void of_pci_range_to_resource(struct of_pci_range *range,
-					    struct device_node *np,
-					    struct resource *res)
+static inline int of_pci_range_to_resource(struct of_pci_range *range,
+					   struct device_node *np,
+					   struct resource *res)
 {
 	return -ENOSYS;
 }