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| author | Zhichang Yuan <yuanzhichang@hisilicon.com> | 2015-04-24 17:05:09 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-05-16 10:38:39 -0500 |
| commit | 5dbb4c6167229c8d4f528e8ec26699a7305000a3 (patch) | |
| tree | 12d4d6e98f4c376632de1b80948c9a005ed4f544 /drivers/of/address.c | |
| parent | 5ebe6afaf0057ac3eaeb98defd5456894b446d22 (diff) | |
| download | lwn-5dbb4c6167229c8d4f528e8ec26699a7305000a3.tar.gz lwn-5dbb4c6167229c8d4f528e8ec26699a7305000a3.zip | |
of/pci: Fix pci_address_to_pio() conversion of CPU address to I/O port
41f8bba7f555 ("of/pci: Add pci_register_io_range() and
pci_pio_to_address()") added support for systems with several I/O ranges
described by OF bindings. It modified pci_address_to_pio() look up the
io_range for a given CPU physical address, but the conversion was wrong.
Fix the conversion of address to I/O port.
[bhelgaas: changelog]
Fixes: 41f8bba7f555 ("of/pci: Add pci_register_io_range() and pci_pio_to_address()")
Signed-off-by: Zhichang Yuan <yuanzhichang@hisilicon.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
CC: stable@vger.kernel.org # v3.18+
Diffstat (limited to 'drivers/of/address.c')
| -rw-r--r-- | drivers/of/address.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index 78a7dcbec7d8..6906a3f61bd8 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -765,7 +765,7 @@ unsigned long __weak pci_address_to_pio(phys_addr_t address) spin_lock(&io_range_lock); list_for_each_entry(res, &io_range_list, list) { if (address >= res->start && address < res->start + res->size) { - addr = res->start - address + offset; + addr = address - res->start + offset; break; } offset += res->size; |