From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> [ Upstream commit 005479556197f80139771960dda0dfdcd2d2aad5 ] 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: 00d7ddba1143 ("hv_netvsc: pair VF based on serial number") Reported-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Reviewed-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/hyperv/netvsc_drv.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 3af6d8d15233..1c37a821895b 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -2022,14 +2022,15 @@ 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 */ @@ -2040,16 +2041,22 @@ 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; } -- 2.17.1