From 0dc78621918693face1700d1379c2b9f740282f5 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Tue, 27 Jun 2017 00:50:25 -0700 Subject: [PATCH] nfp: handle SR-IOV already enabled when driver is probing 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 Reviewed-by: Simon Horman Signed-off-by: David S. Miller --- 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; -- 2.20.1