We assumed that when we probe number of enabled VFs will be at 0.
This doesn't have to be the case for example if previous driver left
SR-IOV enabled due to some VFs being assigned. Read the number of VFs
enabled. Fail probe if it's above current FWs limit.
Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Reviewed-by: Simon Horman <simon.hor...@netronome.com>
---
drivers/net/ethernet/netronome/nfp/nfp_main.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c
b/drivers/net/ethernet/netronome/nfp/nfp_main.c
index 748e54cc885e..d47adb4c86d6 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c
@@ -414,6 +414,14 @@ static int nfp_pci_probe(struct pci_dev *pdev,
if (err)
goto err_fw_unload;
+ pf->num_vfs = pci_num_vf(pdev);
+ if (pf->num_vfs > pf->limit_vfs) {
+ dev_err(&pdev->dev,
+ "Error: %d VFs already enabled, but loaded FW can only
support %d\n",
+ pf->num_vfs, pf->limit_vfs);
+ goto err_fw_unload;
+ }
+
err = nfp_net_pci_probe(pf);
if (err)
goto err_sriov_unlimit;
--
2.11.0
