[PATCH] nfp: Fix passing zero to 'PTR_ERR'

[YueHaibing]

nfp_cpp_from_nfp6000_pcie() returns ERR_PTR() and never returns
NULL. The NULL test should be removed, also return correct err.

Fixes: 63461a028f76 ("nfp: add the PF driver")
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_main.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c 
b/drivers/net/ethernet/netronome/nfp/nfp_main.c
index 7ff2ccbd43b0..e672614d2906 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c
@@ -724,10 +724,8 @@ static int nfp_pci_probe(struct pci_dev *pdev,
        }
 
        pf->cpp = nfp_cpp_from_nfp6000_pcie(pdev);
-       if (IS_ERR_OR_NULL(pf->cpp)) {
+       if (IS_ERR(pf->cpp)) {
                err = PTR_ERR(pf->cpp);
-               if (err >= 0)
-                       err = -ENOMEM;
                goto err_disable_msix;
        }
 
-- 
2.17.1