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| author | Pavel Fedin <p.fedin@samsung.com> | 2015-10-08 10:24:25 +0300 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2015-10-13 13:30:37 -0500 |
| commit | 4af971064977b00a437c1ed8ead8876db4e3b58a (patch) | |
| tree | ea89acfd1b304e923a78ddd668faecfeddd41f1e /drivers/of/address.c | |
| parent | ae1add247bf8c22facacbd818142f1f66e735802 (diff) | |
| download | linux-4af971064977b00a437c1ed8ead8876db4e3b58a.tar.bz2 | |
PCI: of: Add 64-bit address recognition without LPAE support
If non-LPAE kernel is booted up on a machine with 64-bit PCI resources,
PCI controller probe fails with:
PCI host bridge /pcie@10000000 ranges:
IO 0x3eff0000..0x3effffff -> 0x00000000
MEM 0x10000000..0x3efeffff -> 0x10000000
MEM 0x8000000000..0xffffffffff -> 0x8000000000
pci-host-generic 3f000000.pcie: resource collision: [mem 0x00000000-0xffffffff] conflicts with /pl011@9000000 [mem 0x09000000-0x09000fff]
pci-host-generic: probe of 3f000000.pcie failed with error -16
This happens because res->start assignment in of_pci_range_to_resource()
truncates the upper part of the address, because res->start is of
phys_addr_t type, which is 32-bit on non-LPAE kernels.
This patch adds explicit recognition of 64-bit resources, preventing from
potential problems when e. g. 0x8000001234 would be converted to
0x00001234.
Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/address.c')
| -rw-r--r-- | drivers/of/address.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index 384574c3987c..cd53fe4a0c86 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -330,6 +330,12 @@ int of_pci_range_to_resource(struct of_pci_range *range, } res->start = port; } else { + if ((sizeof(resource_size_t) < 8) && + upper_32_bits(range->cpu_addr)) { + err = -EINVAL; + goto invalid_range; + } + res->start = range->cpu_addr; } res->end = res->start + range->size - 1; |