diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2010-01-22 10:02:23 +0100 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-02-23 01:17:21 +0100 |
| commit | d65245c3297ac63abc51a976d92f45f2195d2854 (patch) | |
| tree | 97dbc9a714ef03810609f2d5faca1f56fd872547 /drivers/pci/setup-bus.c | |
| parent | PCI: reject mmio ranges starting at 0 on pci_bridge read (diff) | |
| download | linux-d65245c3297ac63abc51a976d92f45f2195d2854.tar.xz linux-d65245c3297ac63abc51a976d92f45f2195d2854.zip | |
PCI: don't shrink bridge resources
When clearing leaf bridge resources, trying to get a big enough one, we
could shrink the bridge if there is no resource under it. Confirm
against the old resource side to make sure we're increasing the
allocation.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/setup-bus.c')
| -rw-r--r-- | drivers/pci/setup-bus.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 7e87ea8f3200..f560814c557c 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -382,7 +382,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size) { struct pci_dev *dev; struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO); - unsigned long size = 0, size1 = 0; + unsigned long size = 0, size1 = 0, old_size; if (!b_res) return; @@ -407,12 +407,17 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size) } if (size < min_size) size = min_size; + old_size = resource_size(b_res); + if (old_size == 1) + old_size = 0; /* To be fixed in 2.5: we should have sort of HAVE_ISA flag in the struct pci_bus. */ #if defined(CONFIG_ISA) || defined(CONFIG_EISA) size = (size & 0xff) + ((size & ~0xffUL) << 2); #endif size = ALIGN(size + size1, 4096); + if (size < old_size) + size = old_size; if (!size) { if (b_res->start || b_res->end) dev_info(&bus->self->dev, "disabling bridge window " @@ -433,7 +438,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, unsigned long type, resource_size_t min_size) { struct pci_dev *dev; - resource_size_t min_align, align, size; + resource_size_t min_align, align, size, old_size; resource_size_t aligns[12]; /* Alignments from 1Mb to 2Gb */ int order, max_order; struct resource *b_res = find_free_bus_resource(bus, type); @@ -483,6 +488,11 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, } 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; |