refactor code that calculates the io size in pbus_size_io()
and pbus_mem_io() into separate functions.
Signed-off-by: Ram Pai <linuxram@xxxxxxxxxx>
---
drivers/pci/setup-bus.c | 66 ++++++++++++++++++++++++++++++-----------------
1 files changed, 42 insertions(+), 24 deletions(-)
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 66cb8f4..2121215 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -404,6 +404,43 @@ static struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned lon
return NULL;
}
...
+
+static resource_size_t calculate_memsize(resource_size_t size,
+ resource_size_t min_size,
+ resource_size_t size1,
+ resource_size_t old_size,
+ resource_size_t align)
+{
+ if (size < min_size)
+ size = min_size;
+ if (old_size == 1 )
+ old_size = 0;
+ if (size < old_size)
+ size = old_size;
+ size = ALIGN(size + size1, align);
+ return size;
+}
+
/* Sizing the IO windows of the PCI-PCI bridge is trivial,
since these windows have 4K granularity and the IO ranges
of non-bridge PCI devices are limited to 256 bytes.
...
@@ -516,14 +542,6 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
mem64_mask &= r->flags & IORESOURCE_MEM_64;
}
}
- if (size < min_size)
- size = min_size;
- old_size = resource_size(b_res);
- if (old_size == 1)
- old_size = 0;
- if (size < old_size)
- size = old_size;
-
align = 0;
min_align = 0;
for (order = 0; order <= max_order; order++) {
@@ -537,7 +555,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
min_align = align1 >> 1;
align += aligns[order];
}
- size = ALIGN(size, min_align);
+ size = calculate_memsize(size, min_size, 0, resource_size(b_res), align);
On my SPARC32/LEON4 PCI system I get overlapped areas, double mapped
resources. Some BARs on PCIBUS0 are in the same non-prefetchable memory
range as the secondary bus PCIBUS1. Changing align to min_align in the
above call to calculate_memsize() fixes the problem, and the memory
allocation is the same as with 2.6.36.4 kernel.
I belive this is just a typo.
Best Regards,
Daniel Hellstrom
Aeroflex Gaisler
if (!size) {
if (b_res->start || b_res->end)
dev_info(&bus->self->dev, "disabling bridge window "
--
1.6.5.2
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