From 71158bf2e748e2710616f59a823619af3c5505a7 Mon Sep 17 00:00:00 2001 From: Daniel Pieczko Date: Tue, 2 Jun 2015 11:40:31 +0100 Subject: [PATCH] sfc: do not allow VFs to be destroyed if assigned to guests Signed-off-by: Shradha Shah Signed-off-by: David S. Miller --- drivers/net/ethernet/sfc/ef10_sriov.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/net/ethernet/sfc/ef10_sriov.c b/drivers/net/ethernet/sfc/ef10_sriov.c index cd524543c363..083c534bc4ec 100644 --- a/drivers/net/ethernet/sfc/ef10_sriov.c +++ b/drivers/net/ethernet/sfc/ef10_sriov.c @@ -417,6 +417,15 @@ static int efx_ef10_pci_sriov_disable(struct efx_nic *efx) { struct pci_dev *dev = efx->pci_dev; + if (!efx->vf_count) + return 0; + + if (pci_vfs_assigned(dev)) { + netif_err(efx, drv, efx->net_dev, "VFs are assigned to guests; " + "please detach them before disabling SR-IOV\n"); + return -EBUSY; + } + pci_disable_sriov(dev); efx_ef10_sriov_free_vf_vswitching(efx); efx->vf_count = 0; -- 2.11.0