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acpi_piix4: Remove PCI_RMV_BASE write code 

Clarify this register as read-only and remove write code.  No
change in existing behavior.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Alex Williamson 2012-04-05 11:07:21 -06:00 committed by Michael S. Tsirkin
parent 7faa8075d8
commit 31745aabcd
2 changed files with 1 additions and 7 deletions
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2
docs/specs/acpi_pci_hotplug.txt
View File

@ -34,4 +34,4 @@ PCI removability status (IO port 0xae0c-0xae0f, 4-byte access):
-----------------------------------------------
Used by ACPI BIOS _RMV method to indicate removability status to OS. One
bit per slot.
bit per slot. Read-only

6
hw/acpi_piix4.c
View File

@ -531,11 +531,6 @@ static uint32_t pcirmv_read(void *opaque, uint32_t addr)
return s->pci0_hotplug_enable;
}
static void pcirmv_write(void *opaque, uint32_t addr, uint32_t val)
{
return;
}
static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
PCIHotplugState state);
@ -552,7 +547,6 @@ static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, s);
register_ioport_read(PCI_EJ_BASE, 4, 4, pciej_read, s);
register_ioport_write(PCI_RMV_BASE, 4, 4, pcirmv_write, s);
register_ioport_read(PCI_RMV_BASE, 4, 4, pcirmv_read, s);
pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);