[PATCH 4.4 63/76] PCI: Decouple IORESOURCE_ROM_ENABLE and PCI_ROM_ADDRESS_ENABLE

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sumit Semwal <sumit.sem...@linaro.org>


From: Bjorn Helgaas <bhelg...@google.com>

[ Upstream commit 7a6d312b50e63f598f5b5914c4fd21878ac2b595 ]

Remove the assumption that IORESOURCE_ROM_ENABLE == PCI_ROM_ADDRESS_ENABLE.
PCI_ROM_ADDRESS_ENABLE is the ROM enable bit defined by the PCI spec, so if
we're reading or writing a BAR register value, that's what we should use.
IORESOURCE_ROM_ENABLE is a corresponding bit in struct resource flags.

Signed-off-by: Bjorn Helgaas <bhelg...@google.com>
Reviewed-by: Gavin Shan <gws...@linux.vnet.ibm.com>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Sumit Semwal <sumit.sem...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/pci/probe.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -226,7 +226,8 @@ int __pci_read_base(struct pci_dev *dev,
                        mask64 = (u32)PCI_BASE_ADDRESS_MEM_MASK;
                }
        } else {
-               res->flags |= (l & IORESOURCE_ROM_ENABLE);
+               if (l & PCI_ROM_ADDRESS_ENABLE)
+                       res->flags |= IORESOURCE_ROM_ENABLE;
                l64 = l & PCI_ROM_ADDRESS_MASK;
                sz64 = sz & PCI_ROM_ADDRESS_MASK;
                mask64 = (u32)PCI_ROM_ADDRESS_MASK;