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hv_netvsc: fix vf serial matching with pci slot info 

The VF device's serial number is saved as a string in PCI slot's
kobj name, not the slot->number. This patch corrects the netvsc
driver, so the VF device can be successfully paired with synthetic
NIC.

Fixes: 00d7ddba11 ("hv_netvsc: pair VF based on serial number")
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haiyang Zhang 2018-10-15 19:06:15 +00:00 committed by David S. Miller
parent b13949678b
commit 0054795561
1 changed files with 11 additions and 4 deletions
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15
drivers/net/hyperv/netvsc_drv.c
View File

@ -2030,14 +2030,15 @@ static void netvsc_vf_setup(struct work_struct *w)
rtnl_unlock();
}
/* Find netvsc by VMBus serial number.
* The PCI hyperv controller records the serial number as the slot.
/* Find netvsc by VF serial number.
* The PCI hyperv controller records the serial number as the slot kobj name.
*/
static struct net_device *get_netvsc_byslot(const struct net_device *vf_netdev)
{
struct device *parent = vf_netdev->dev.parent;
struct net_device_context *ndev_ctx;
struct pci_dev *pdev;
u32 serial;
if (!parent || !dev_is_pci(parent))
return NULL; /* not a PCI device */
@ -2048,16 +2049,22 @@ static struct net_device *get_netvsc_byslot(const struct net_device *vf_netdev)
return NULL;
}
if (kstrtou32(pci_slot_name(pdev->slot), 10, &serial)) {
netdev_notice(vf_netdev, "Invalid vf serial:%s\n",
pci_slot_name(pdev->slot));
return NULL;
}
list_for_each_entry(ndev_ctx, &netvsc_dev_list, list) {
if (!ndev_ctx->vf_alloc)
continue;
if (ndev_ctx->vf_serial == pdev->slot->number)
if (ndev_ctx->vf_serial == serial)
return hv_get_drvdata(ndev_ctx->device_ctx);
}
netdev_notice(vf_netdev,
"no netdev found for slot %u\n", pdev->slot->number);
"no netdev found for vf serial:%u\n", serial);
return NULL;
}