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PCI: Fix calculation of bridge window's size and alignment

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In case that one device's alignment is greater than its size, we may
get an incorrect size and alignment for its bus's memory window in
pbus_size_mem().  Fix this case.

Signed-off-by: Yongji Xie <elohimes@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yongji Xie 2017-04-10 19:58:11 +08:00 committed by Bjorn Helgaas
parent ea629d873f
commit c9c75143a5
1 changed files with 2 additions and 2 deletions
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4
drivers/pci/setup-bus.c
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@ -1066,10 +1066,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
r->flags = 0;
continue;
}
size += r_size;
size += max(r_size, align);
/* Exclude ranges with size > align from
calculation of the alignment. */
if (r_size == align)
if (r_size <= align)
aligns[order] += align;
if (order > max_order)
max_order = order;