From: Daniel Pieczko <dpiec...@solarflare.com>
Signed-off-by: Shradha Shah <ss...@solarflare.com>
---
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 cd52454..083c534 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;
--
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