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virtio: Notice when the system doesn't support MSIx at all

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And do not issue an error_report in that case.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Richard Henderson 2015-05-19 13:29:51 -07:00 committed by Michael S. Tsirkin
parent 798595075b
commit 0d583647a7
1 changed files with 11 additions and 6 deletions
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11
hw/virtio/virtio-pci.c
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@ -1491,13 +1491,18 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
}
if (proxy->nvectors &&
msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
proxy->msix_bar)) {
if (proxy->nvectors) {
int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
proxy->msix_bar);
if (err) {
/* Notice when a system that supports MSIx can't initialize it. */
if (err != -ENOTSUP) {
error_report("unable to init msix vectors to %" PRIu32,
proxy->nvectors);
}
proxy->nvectors = 0;
}
}
proxy->pci_dev.config_write = virtio_write_config;
proxy->pci_dev.config_read = virtio_read_config;