diff options
Diffstat (limited to 'drivers/pci/setup-bus.c')
| -rw-r--r-- | drivers/pci/setup-bus.c | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index a66cf0905a15..1e808ca338f8 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -812,6 +812,28 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size, } } +static inline resource_size_t calculate_mem_align(resource_size_t *aligns, + int max_order) +{ + resource_size_t align = 0; + resource_size_t min_align = 0; + int order; + + for (order = 0; order <= max_order; order++) { + resource_size_t align1 = 1; + + align1 <<= (order + 20); + + if (!align) + min_align = align1; + else if (ALIGN(align + min_align, min_align) < align1) + min_align = align1 >> 1; + align += aligns[order]; + } + + return min_align; +} + /** * pbus_size_mem() - size the memory window of a given bus * @@ -891,20 +913,8 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, children_add_size += get_res_add_size(realloc_head, r); } } - align = 0; - min_align = 0; - for (order = 0; order <= max_order; order++) { - resource_size_t align1 = 1; - - align1 <<= (order + 20); - - if (!align) - min_align = align1; - else if (ALIGN(align + min_align, min_align) < align1) - min_align = align1 >> 1; - align += aligns[order]; - } + min_align = calculate_mem_align(aligns, max_order); min_align = max(min_align, window_alignment(bus, b_res->flags & mask)); size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align); if (children_add_size > add_size) |