net/virtio: remove redundant MSI-X detection

As we already change to use capability list to detect MSI-X, remove
the redundant MSI-X detection in legacy devices.

Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>

diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 1e17757..1df26a6 100644 (file)
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -279,32 +279,6 @@ legacy_notify_queue(struct virtio_hw *hw, struct virtqueue *vq)
                         VIRTIO_PCI_QUEUE_NOTIFY);
 }
 
-#ifdef RTE_EXEC_ENV_LINUXAPP
-static int
-legacy_virtio_has_msix(const struct rte_pci_addr *loc)
-{
-       DIR *d;
-       char dirname[PATH_MAX];
-
-       snprintf(dirname, sizeof(dirname),
-                    "%s/" PCI_PRI_FMT "/msi_irqs", pci_get_sysfs_path(),
-                    loc->domain, loc->bus, loc->devid, loc->function);
-
-       d = opendir(dirname);
-       if (d)
-               closedir(d);
-
-       return d != NULL;
-}
-#else
-static int
-legacy_virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
-{
-       /* nic_uio does not enable interrupts, return 0 (false). */
-       return 0;
-}
-#endif
-
 const struct virtio_pci_ops legacy_ops = {
        .read_dev_cfg   = legacy_read_dev_config,
        .write_dev_cfg  = legacy_write_dev_config,
@@ -725,7 +699,6 @@ vtpci_init(struct rte_pci_device *dev, struct virtio_hw *hw)
        }
 
        virtio_hw_internal[hw->port_id].vtpci_ops = &legacy_ops;
-       hw->use_msix = legacy_virtio_has_msix(&dev->addr);
        hw->modern   = 0;
 
        return 0;