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serial: fix multi-pci card error cleanup. 

Put the number of serial ports into a local variable in
multi_serial_pci_realize, then increment the port count
(pci->ports) as we initialize the serial port cores.

Now pci->ports always holds the number of successfully
initialized ports and we can use multi_serial_pci_exit
to properly cleanup the already initialized bits in case
of a init failure.

https://bugzilla.redhat.com/show_bug.cgi?id=970551

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Gerd Hoffmann 2015-05-06 12:58:19 +02:00
parent faa261a7fb
commit a48da7b5bc
1 changed files with 12 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
hw/char/serial-pci.c
View File

@ -48,6 +48,8 @@ typedef struct PCIMultiSerialState {
uint8_t prog_if;
} PCIMultiSerialState;
static void multi_serial_pci_exit(PCIDevice *dev);
static void serial_pci_realize(PCIDevice *dev, Error **errp)
{
PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
@ -89,32 +91,33 @@ static void multi_serial_pci_realize(PCIDevice *dev, Error **errp)
PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev);
SerialState *s;
Error *err = NULL;
int i;
int i, nr_ports = 0;
switch (pc->device_id) {
case 0x0003:
pci->ports = 2;
nr_ports = 2;
break;
case 0x0004:
pci->ports = 4;
nr_ports = 4;
break;
}
assert(pci->ports > 0);
assert(pci->ports <= PCI_SERIAL_MAX_PORTS);
assert(nr_ports > 0);
assert(nr_ports <= PCI_SERIAL_MAX_PORTS);
pci->dev.config[PCI_CLASS_PROG] = pci->prog_if;
pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
memory_region_init(&pci->iobar, OBJECT(pci), "multiserial", 8 * pci->ports);
memory_region_init(&pci->iobar, OBJECT(pci), "multiserial", 8 * nr_ports);
pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &pci->iobar);
pci->irqs = qemu_allocate_irqs(multi_serial_irq_mux, pci,
pci->ports);
nr_ports);
for (i = 0; i < pci->ports; i++) {
for (i = 0; i < nr_ports; i++) {
s = pci->state + i;
s->baudbase = 115200;
serial_realize_core(s, &err);
if (err != NULL) {
error_propagate(errp, err);
multi_serial_pci_exit(dev);
return;
}
s->irq = pci->irqs[i];
@ -122,6 +125,7 @@ static void multi_serial_pci_realize(PCIDevice *dev, Error **errp)
memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s,
pci->name[i], 8);
memory_region_add_subregion(&pci->iobar, 8 * i, &s->io);
pci->ports++;
}
}