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Subject[PATCH] PCI: make pci_size() return real size
Date
From: Du Changbin <changbin.du@gmail.com>

Currently, the pci_size() function actually return 'size-1'.
Make it return real size to avoid confusing.

Signed-off-by: Du Changbin <changbin.du@gmail.com>
---
drivers/pci/probe.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 201f9e5ff55c..8ff2b1413865 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -121,13 +121,13 @@ static u64 pci_size(u64 base, u64 maxbase, u64 mask)
* Get the lowest of them to find the decode size, and from that
* the extent.
*/
- size = (size & ~(size-1)) - 1;
+ size = size & ~(size-1);

/*
* base == maxbase can be valid only if the BAR has already been
* programmed with all 1s.
*/
- if (base == maxbase && ((base | size) & mask) != mask)
+ if (base == maxbase && ((base | (size - 1)) & mask) != mask)
return 0;

return size;
@@ -278,7 +278,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
/* Above 32-bit boundary; try to reallocate */
res->flags |= IORESOURCE_UNSET;
res->start = 0;
- res->end = sz64;
+ res->end = sz64 - 1;
pci_info(dev, "reg 0x%x: can't handle BAR above 4GB (bus address %#010llx)\n",
pos, (unsigned long long)l64);
goto out;
@@ -286,7 +286,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
}

region.start = l64;
- region.end = l64 + sz64;
+ region.end = l64 + sz64 - 1;

pcibios_bus_to_resource(dev->bus, res, &region);
pcibios_resource_to_bus(dev->bus, &inverted_region, res);
--
2.17.1
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