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PCI: modify PCI bridge control ISA flag for clarity 

Modify PCI Bridge Control ISA flag for clarity

This patch changes PCI_BRIDGE_CTL_NO_ISA to PCI_BRIDGE_CTL_ISA
and modifies it's clarifying comment and locations where used.
The change reduces the chance of future confusion since it makes
the set/unset meaning of the bit the same in both the bridge
control register and bridge_ctl field of the pci_bus struct.

Signed-off-by: Gary Hade <garyhade@us.ibm.com>
Acked-by: Linas Vepstas <linas@austin.ibm.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Gary Hade 2007-10-08 16:24:16 -07:00 committed by Greg Kroah-Hartman
parent 62f420f828
commit 11949255d9
3 changed files with 4 additions and 4 deletions
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2
arch/x86/pci/i386.c
View File

@ -37,7 +37,7 @@ static int
skip_isa_ioresource_align(struct pci_dev *dev) { skip_isa_ioresource_align(struct pci_dev *dev) {
if ((pci_probe & PCI_CAN_SKIP_ISA_ALIGN) && if ((pci_probe & PCI_CAN_SKIP_ISA_ALIGN) &&
(dev->bus->bridge_ctl & PCI_BRIDGE_CTL_NO_ISA)) !(dev->bus->bridge_ctl & PCI_BRIDGE_CTL_ISA))
return 1; return 1;
return 0; return 0;
} }

4
drivers/pci/probe.c
View File

@ -543,7 +543,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass
goto out; goto out;
child->primary = buses & 0xFF; child->primary = buses & 0xFF;
child->subordinate = (buses >> 16) & 0xFF; child->subordinate = (buses >> 16) & 0xFF;
child->bridge_ctl = bctl ^ PCI_BRIDGE_CTL_NO_ISA; child->bridge_ctl = bctl;
cmax = pci_scan_child_bus(child); cmax = pci_scan_child_bus(child);
if (cmax > max) if (cmax > max)
@ -596,7 +596,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass
pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses); pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses);
if (!is_cardbus) { if (!is_cardbus) {
child->bridge_ctl = bctl ^ PCI_BRIDGE_CTL_NO_ISA; child->bridge_ctl = bctl;
/* /*
* Adjust subordinate busnr in parent buses. * Adjust subordinate busnr in parent buses.
* We do this before scanning for children because * We do this before scanning for children because

2
include/linux/pci_regs.h
View File

@ -147,7 +147,7 @@
#define PCI_BRIDGE_CONTROL 0x3e #define PCI_BRIDGE_CONTROL 0x3e
#define PCI_BRIDGE_CTL_PARITY 0x01 /* Enable parity detection on secondary interface */ #define PCI_BRIDGE_CTL_PARITY 0x01 /* Enable parity detection on secondary interface */
#define PCI_BRIDGE_CTL_SERR 0x02 /* The same for SERR forwarding */ #define PCI_BRIDGE_CTL_SERR 0x02 /* The same for SERR forwarding */
#define PCI_BRIDGE_CTL_NO_ISA 0x04 /* Disable bridging of ISA ports */ #define PCI_BRIDGE_CTL_ISA 0x04 /* Enable ISA mode */
#define PCI_BRIDGE_CTL_VGA 0x08 /* Forward VGA addresses */ #define PCI_BRIDGE_CTL_VGA 0x08 /* Forward VGA addresses */
#define PCI_BRIDGE_CTL_MASTER_ABORT 0x20 /* Report master aborts */ #define PCI_BRIDGE_CTL_MASTER_ABORT 0x20 /* Report master aborts */
#define PCI_BRIDGE_CTL_BUS_RESET 0x40 /* Secondary bus reset */ #define PCI_BRIDGE_CTL_BUS_RESET 0x40 /* Secondary bus reset */