From: Jianfeng Tan <jianfeng.tan@intel.com>
Date: Thu, 27 Apr 2017 07:35:38 +0000 (+0000)
Subject: net/virtio: remove redundant MSI-X detection
X-Git-Tag: spdx-start~3329
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=ee1843bd8907;p=dpdk.git

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 1e1775720f..1df26a691d 100644
--- 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;