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[for-4.4,08/19] PCI: Decouple IORESOURCE_ROM_ENABLE and PCI_ROM_ADDRESS_ENABLE

Message ID 1490458699-24484-9-git-send-email-sumit.semwal@linaro.org
State New
Headers show
Series Stable commits from Ubuntu Yakkety 4.9-lts | expand

Commit Message

Sumit Semwal March 25, 2017, 4:18 p.m. UTC 
From: Bjorn Helgaas <bhelgaas@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 <bhelgaas@google.com>

Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>

Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>

---
 drivers/pci/probe.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
2.7.4
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Patch

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 71d9a6d..b83df94 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -226,7 +226,8 @@  int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 			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;