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i386/kvm/pci-assign: Fix return type of verify_irqchip_kernel() 

When the function no success value to transmit, it usually make the
function return void. It has turned out not to be a success, because
it means that the extra local_err variable and error_propagate() will
be needed. It leads to cumbersome code, therefore, transmit success/
failure in the return value is worth. So fix the return type to avoid
it.

Cc: pbonzini@redhat.com
Cc: rth@twiddle.net
Cc: ehabkost@redhat.com
Cc: mst@redhat.com
Cc: armbru@redhat.com
Cc: marcel@redhat.com
Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Mao Zhongyi 2017-06-27 14:16:54 +08:00 committed by Michael S. Tsirkin
parent 344475e77d
commit 6b728b3116
1 changed files with 6 additions and 12 deletions
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18
hw/i386/kvm/pci-assign.c
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@ -824,12 +824,13 @@ static void assign_device(AssignedDevice *dev, Error **errp)
}
}
static void verify_irqchip_in_kernel(Error **errp)
static int verify_irqchip_in_kernel(Error **errp)
{
if (kvm_irqchip_in_kernel()) {
return;
return -1;
}
error_setg(errp, "pci-assign requires KVM with in-kernel irqchip enabled");
return 0;
}
static int assign_intx(AssignedDevice *dev, Error **errp)
@ -838,7 +839,6 @@ static int assign_intx(AssignedDevice *dev, Error **errp)
PCIINTxRoute intx_route;
bool intx_host_msi;
int r;
Error *local_err = NULL;
/* Interrupt PIN 0 means don't use INTx */
if (assigned_dev_pci_read_byte(&dev->dev, PCI_INTERRUPT_PIN) == 0) {
@ -846,9 +846,7 @@ static int assign_intx(AssignedDevice *dev, Error **errp)
return 0;
}
verify_irqchip_in_kernel(&local_err);
if (local_err) {
error_propagate(errp, local_err);
if (verify_irqchip_in_kernel(errp) < 0) {
return -ENOTSUP;
}
@ -1246,9 +1244,7 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev, Error **errp)
* MSI capability is the 1st capability in capability config */
pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_MSI, 0);
if (pos != 0 && kvm_check_extension(kvm_state, KVM_CAP_ASSIGN_DEV_IRQ)) {
verify_irqchip_in_kernel(&local_err);
if (local_err) {
error_propagate(errp, local_err);
if (verify_irqchip_in_kernel(errp) < 0) {
return -ENOTSUP;
}
dev->dev.cap_present |= QEMU_PCI_CAP_MSI;
@ -1281,9 +1277,7 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev, Error **errp)
uint32_t msix_table_entry;
uint16_t msix_max;
verify_irqchip_in_kernel(&local_err);
if (local_err) {
error_propagate(errp, local_err);
if (verify_irqchip_in_kernel(errp) < 0) {
return -ENOTSUP;
}
dev->dev.cap_present |= QEMU_PCI_CAP_MSIX;