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| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2010-12-16 10:38:31 -0700 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-12-17 10:00:49 -0800 |
| commit | d14125ecfee05473de46f06d992db109308c57a3 (patch) | |
| tree | 97bf6c8fb4b5320ddd4ae170afb11df6d26af8a8 /arch/x86/pci | |
| parent | 5e52f1c5e85fdc3831eeae8b546577e94a586f81 (diff) | |
| download | linux-d14125ecfee05473de46f06d992db109308c57a3.tar.gz linux-d14125ecfee05473de46f06d992db109308c57a3.tar.bz2 linux-d14125ecfee05473de46f06d992db109308c57a3.zip | |
Revert "x86/PCI: allocate space from the end of a region, not the beginning"
This reverts commit dc9887dc02e37bcf83f4e792aa14b07782ef54cf.
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/i386.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index c4bb261c106e..8379c2c3d076 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -65,21 +65,16 @@ pcibios_align_resource(void *data, const struct resource *res, resource_size_t size, resource_size_t align) { struct pci_dev *dev = data; - resource_size_t start = round_down(res->end - size + 1, align); + resource_size_t start = res->start; if (res->flags & IORESOURCE_IO) { - - /* - * If we're avoiding ISA aliases, the largest contiguous I/O - * port space is 256 bytes. Clearing bits 9 and 10 preserves - * all 256-byte and smaller alignments, so the result will - * still be correctly aligned. - */ - if (!skip_isa_ioresource_align(dev)) - start &= ~0x300; + if (skip_isa_ioresource_align(dev)) + return start; + if (start & 0x300) + start = (start + 0x3ff) & ~0x3ff; } else if (res->flags & IORESOURCE_MEM) { if (start < BIOS_END) - start = res->end; /* fail; no space */ + start = BIOS_END; } return start; } |