diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2012-01-21 02:08:17 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-26 11:34:57 -0800 |
| commit | 8515be67754c94ec193a936b5a9bbaf88d4dae90 (patch) | |
| tree | 4f70bfbef3d28361653fa9b29a0fd476e1a1d53b /drivers/gpio/ucb1400_gpio.c | |
| parent | 36720ae8b37c324a1c2e8ad9652f08b180081861 (diff) | |
PCI : Calculate right add_size
commit a4ac9fea016fc5c09227eb479bd35e34978323a4 upstream.
During debug of one SRIOV enabled hotplug device, we found found that
add_size is not passed properly.
The device has devices under two level bridges:
+-[0000:80]-+-00.0-[81-8f]--
| +-01.0-[90-9f]--
| +-02.0-[a0-af]----00.0-[a1-a3]--+-02.0-[a2]--+-00.0 Oracle Corporation Device
| | \-03.0-[a3]--+-00.0 Oracle Corporation Device
Which means later the parent bridge will not try to add a big enough range:
[ 557.455077] pci 0000:a0:00.0: BAR 14: assigned [mem 0xf9000000-0xf93fffff]
[ 557.461974] pci 0000:a0:00.0: BAR 15: assigned [mem 0xf6000000-0xf61fffff pref]
[ 557.469340] pci 0000:a1:02.0: BAR 14: assigned [mem 0xf9000000-0xf91fffff]
[ 557.476231] pci 0000:a1:02.0: BAR 15: assigned [mem 0xf6000000-0xf60fffff pref]
[ 557.483582] pci 0000:a1:03.0: BAR 14: assigned [mem 0xf9200000-0xf93fffff]
[ 557.490468] pci 0000:a1:03.0: BAR 15: assigned [mem 0xf6100000-0xf61fffff pref]
[ 557.497833] pci 0000:a1:03.0: BAR 14: can't assign mem (size 0x200000)
[ 557.504378] pci 0000:a1:03.0: failed to add optional resources res=[mem 0xf9200000-0xf93fffff]
[ 557.513026] pci 0000:a1:02.0: BAR 14: can't assign mem (size 0x200000)
[ 557.519578] pci 0000:a1:02.0: failed to add optional resources res=[mem 0xf9000000-0xf91fffff]
It turns out we did not calculate size1 properly.
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;
}
We should not pass add_size with min_size in calculate_memsize since
that will make add_size not contribute final add_size.
So just pass add_size with size1 to calculate_memsize().
With this change, we should have chance to remove extra addon in
pci_reassign_resource.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Andrew Worsley <amworsley@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpio/ucb1400_gpio.c')
0 files changed, 0 insertions, 0 deletions