1 From 3a1470e031ff33ac99da33b41dae0e9082d4da78 Mon Sep 17 00:00:00 2001
2 From: Damjan Marion <damarion@cisco.com>
3 Date: Mon, 15 May 2017 12:27:37 +0200
4 Subject: [PATCH] Revert "net/virtio: remove redundant MSI-X detection"
6 This reverts commit ee1843bd89076c59e50cadbef5c935613f543765.
8 drivers/net/virtio/virtio_pci.c | 27 +++++++++++++++++++++++++++
9 1 file changed, 27 insertions(+)
11 diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
12 index b7b3d6157..127f25791 100644
13 --- a/drivers/net/virtio/virtio_pci.c
14 +++ b/drivers/net/virtio/virtio_pci.c
15 @@ -274,6 +274,32 @@ legacy_notify_queue(struct virtio_hw *hw, struct virtqueue *vq)
16 VIRTIO_PCI_QUEUE_NOTIFY);
19 +#ifdef RTE_EXEC_ENV_LINUXAPP
21 +legacy_virtio_has_msix(const struct rte_pci_addr *loc)
24 + char dirname[PATH_MAX];
26 + snprintf(dirname, sizeof(dirname),
27 + "%s/" PCI_PRI_FMT "/msi_irqs", pci_get_sysfs_path(),
28 + loc->domain, loc->bus, loc->devid, loc->function);
30 + d = opendir(dirname);
38 +legacy_virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
40 + /* nic_uio does not enable interrupts, return 0 (false). */
45 const struct virtio_pci_ops legacy_ops = {
46 .read_dev_cfg = legacy_read_dev_config,
47 .write_dev_cfg = legacy_write_dev_config,
48 @@ -694,6 +720,7 @@ vtpci_init(struct rte_pci_device *dev, struct virtio_hw *hw)
51 virtio_hw_internal[hw->port_id].vtpci_ops = &legacy_ops;
52 + hw->use_msix = legacy_virtio_has_msix(&dev->addr);