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[RFC,2/3] PCI: set proper default value of PCIBIOS_MAX_MEM_32

Message ID 1384843018-9479-3-git-send-email-yan@linux.vnet.ibm.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Guo Chao Nov. 19, 2013, 6:36 a.m. UTC 
PCIBIOS_MAX_MEM_32 is used to prevent 32-bit BAR from getting 4G-above
address. Its default value -1 extends to 0xffffffffffffffff in 64-bit
platform which make it useless at all. While arch can overwrite it,
0xffffffff should be good enough for those who does not have special
requirement. Set PCIBIOS_MAX_MEM_32 to 0xffffffff and kill this
definition in x86.

Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com>
---
 arch/x86/include/asm/pci.h | 1 -
 include/linux/pci.h        | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)
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Patch

diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index 7d74432..73ff4bc 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -125,7 +125,6 @@  int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 
 /* generic pci stuff */
 #include <asm-generic/pci.h>
-#define PCIBIOS_MAX_MEM_32 0xffffffff
 
 #ifdef CONFIG_NUMA
 /* Returns the node based on pci bus */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 835ec7b..f43405d 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1487,7 +1487,7 @@  static inline struct pci_dev *pci_dev_get(struct pci_dev *dev)
 #include <asm/pci.h>
 
 #ifndef PCIBIOS_MAX_MEM_32
-#define PCIBIOS_MAX_MEM_32 (-1)
+#define PCIBIOS_MAX_MEM_32 (0xffffffff)
 #endif
 
 /* these helpers provide future and backwards compatibility