net: enetc: fix missing error code when pf->vf_state allocation fails

In enetc_pf_probe(), when the memory allocation for pf->vf_state fails,
the code jumps to the error handling label but the variable 'err' is not
assigned an appropriate error code beforehand. This causes the function
to return 0 (success) on an allocation failure path, misleading the
caller into thinking the probe succeeded. So set err to -ENOMEM before
jumping to the error handling label when the allocation for pf->vf_state
returns NULL.

Fixes: e15c550 ("net: enetc: allocate vf_state during PF probes")
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Link: https://patch.msgid.link/20260520064421.91569-3-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: WeiFang-NXP

drivers/net/ethernet/freescale/enetc/enetc_pf.c

@@ -962,8 +962,10 @@ static int enetc_pf_probe(struct pci_dev *pdev,
 	if (pf->total_vfs) {
 		pf->vf_state = kzalloc_objs(struct enetc_vf_state,
 					    pf->total_vfs);
-		if (!pf->vf_state)
+		if (!pf->vf_state) {
+			err = -ENOMEM;
 			goto err_alloc_vf_state;
+		}
 	}
 
 	err = enetc_setup_mac_addresses(node, pf);