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pcie/slot: fix hotplug event 

When slot status register is cleared, PCIDevice::exp.hpev_notify
needs to be cleared.
Otherwise, PCIDevice::exp.hpev_notify is never set to false resulting
in no more hot plug event once it's raised.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Isaku Yamahata 2011-08-05 18:22:03 +09:00 committed by Michael S. Tsirkin
parent e8906f3529
commit 1553d4f1fc
1 changed files with 12 additions and 0 deletions
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12
hw/pcie.c
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@ -175,6 +175,14 @@ static void hotplug_event_notify(PCIDevice *dev)
}
}
static void hotplug_event_clear(PCIDevice *dev)
{
hotplug_event_update_event_status(dev);
if (!msix_enabled(dev) && !msi_enabled(dev) && !dev->exp.hpev_notified) {
qemu_set_irq(dev->irq[dev->exp.hpev_intx], 0);
}
}
/*
* A PCI Express Hot-Plug Event has occurred, so update slot status register
* and notify OS of the event if necessary.
@ -320,6 +328,10 @@ void pcie_cap_slot_write_config(PCIDevice *dev,
uint8_t *exp_cap = dev->config + pos;
uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA);
if (ranges_overlap(addr, len, pos + PCI_EXP_SLTSTA, 2)) {
hotplug_event_clear(dev);
}
if (!ranges_overlap(addr, len, pos + PCI_EXP_SLTCTL, 2)) {
return;
}