[PATCH v2] nfp: abm: Fix incomplete release of system resources in nfp_abm_vnic_set_mac()

[wu000273]

From: Qiushi Wu <wu000...@umn.edu>

In function nfp_abm_vnic_set_mac, pointer nsp is allocated by nfp_nsp_open.
But when nfp_nsp_has_hwinfo_lookup fail, the pointer is not released,
which can lead to a memory leak bug. Thus add a call of the function
“nfp_nsp_close” for the completion of the exception handling.

Fixes: f6e71efdf9fb1 ("nfp: abm: look up MAC addresses via management FW")
Signed-off-by: Qiushi Wu <wu000...@umn.edu>
---
 drivers/net/ethernet/netronome/nfp/abm/main.c | 20 +++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/abm/main.c 
b/drivers/net/ethernet/netronome/nfp/abm/main.c
index 9183b3e85d21..a5152f11e2f5 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/main.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/main.c
@@ -265,8 +265,7 @@ nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm 
*abm, struct nfp_net *nn,
 
        if (id > pf->eth_tbl->count) {
                nfp_warn(pf->cpp, "No entry for persistent MAC address\n");
-               eth_hw_addr_random(nn->dp.netdev);
-               return;
+               goto generate_random_address;
        }
 
        snprintf(hwinfo, sizeof(hwinfo), "eth%u.mac.pf%u",
@@ -276,14 +275,13 @@ nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm 
*abm, struct nfp_net *nn,
        if (IS_ERR(nsp)) {
                nfp_warn(pf->cpp, "Failed to access the NSP for persistent MAC 
address: %ld\n",
                         PTR_ERR(nsp));
-               eth_hw_addr_random(nn->dp.netdev);
-               return;
+               goto generate_random_address;
        }
 
        if (!nfp_nsp_has_hwinfo_lookup(nsp)) {
                nfp_warn(pf->cpp, "NSP doesn't support PF MAC generation\n");
-               eth_hw_addr_random(nn->dp.netdev);
-               return;
+               nfp_nsp_close(nsp);
+               goto generate_random_address;
        }
 
        err = nfp_nsp_hwinfo_lookup(nsp, hwinfo, sizeof(hwinfo));
@@ -291,8 +289,7 @@ nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm 
*abm, struct nfp_net *nn,
        if (err) {
                nfp_warn(pf->cpp, "Reading persistent MAC address failed: %d\n",
                         err);
-               eth_hw_addr_random(nn->dp.netdev);
-               return;
+               goto generate_random_address;
        }
 
        if (sscanf(hwinfo, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
@@ -300,12 +297,15 @@ nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm 
*abm, struct nfp_net *nn,
                   &mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6) {
                nfp_warn(pf->cpp, "Can't parse persistent MAC address (%s)\n",
                         hwinfo);
-               eth_hw_addr_random(nn->dp.netdev);
-               return;
+               goto generate_random_address;
        }
 
        ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr);
        ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
+
+generate_random_address:
+       eth_hw_addr_random(nn->dp.netdev);
+       return;
 }
 
 static int
-- 
2.17.1