From 01b37f851ca150554496fd6e79c6d9a67992a2c0 Mon Sep 17 00:00:00 2001 From: Du Changbin Date: Sat, 13 Oct 2018 08:49:19 +0800 Subject: PCI: Make pci_size() return real BAR size Currently, the pci_size() function actually returns 'size-1'. Make it return real size to avoid confusion. Signed-off-by: Du Changbin Signed-off-by: Bjorn Helgaas --- drivers/pci/probe.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/pci/probe.c') diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 2ef8b954c65a..8e2e4154cdd9 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, ®ion); pcibios_resource_to_bus(dev->bus, &inverted_region, res); -- cgit v1.2.3-59-g8ed1b