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authorBjorn Helgaas <bjorn.helgaas@hp.com>2010-12-16 10:38:31 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-12-17 10:00:49 -0800
commitd14125ecfee05473de46f06d992db109308c57a3 (patch)
tree97bf6c8fb4b5320ddd4ae170afb11df6d26af8a8
parent5e52f1c5e85fdc3831eeae8b546577e94a586f81 (diff)
downloadlinux-d14125ecfee05473de46f06d992db109308c57a3.tar.bz2
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>
-rw-r--r--arch/x86/pci/i386.c17
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;
}