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Re: [Qemu-devel] [PATCH] serial: fix multi-pci card error cleanup.
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH] serial: fix multi-pci card error cleanup. |
Date: |
Tue, 19 May 2015 11:42:50 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
On 06/05/2015 13:31, Gerd Hoffmann wrote:
> 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 <address@hidden>
> ---
> hw/char/serial-pci.c | 20 ++++++++++++--------
> 1 file changed, 12 insertions(+), 8 deletions(-)
>
> diff --git a/hw/char/serial-pci.c b/hw/char/serial-pci.c
> index 467c3b4..653064f 100644
> --- a/hw/char/serial-pci.c
> +++ b/hw/char/serial-pci.c
> @@ -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++;
> }
> }
>
>
Reviewed-by: Paolo Bonzini <address@hidden>