[PATCH v2] net/virtio: unmap PCI device in secondary process

[Yuan Wang]

In multi-process, the secondary process will remap PCI during
initialization, but the mapping is not removed in the uninit path,
the device is not closed, and the device busy error will be reported
when the device is hotplugged.

This patch unmaps PCI device at secondary process uninitialization
based on virtio_rempa_pci.

Fixes: 36a7a2e7a53 ("net/virtio: move PCI device init in dedicated file")
Cc: sta...@dpdk.org

Signed-off-by: Yuan Wang <yuanx.w...@intel.com>
Tested-by: Wei Ling <weix.l...@intel.com>
---
 drivers/net/virtio/virtio_pci_ethdev.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_pci_ethdev.c 
b/drivers/net/virtio/virtio_pci_ethdev.c
index 54645dc62e..1f6bdeddda 100644
--- a/drivers/net/virtio/virtio_pci_ethdev.c
+++ b/drivers/net/virtio/virtio_pci_ethdev.c
@@ -122,10 +122,20 @@ static int
 eth_virtio_pci_uninit(struct rte_eth_dev *eth_dev)
 {
        int ret;
+       struct virtio_pci_dev *dev;
+       struct virtio_hw *hw;
        PMD_INIT_FUNC_TRACE();
 
-       if (rte_eal_process_type() == RTE_PROC_SECONDARY)
+       if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+               dev = eth_dev->data->dev_private;
+               hw = &dev->hw;
+
+               if (dev->modern)
+                       rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
+               else
+                       vtpci_legacy_ioport_unmap(hw);
                return 0;
+       }
 
        ret = virtio_dev_stop(eth_dev);
        virtio_dev_close(eth_dev);
-- 
2.25.1