liquidio: fix Coverity scan errors

Fix Coverity scan errors by not dereferencing lio->glists_dma_base pointer
if it's NULL.

See http://marc.info/?l=linux-netdev&m=149002294305614&w=2

Reported-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: VSR Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index b23485c..0bc76ad 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -712,7 +712,8 @@ static void delete_glists(struct lio *lio)
                                kfree(g);
                } while (g);
 
-               if (lio->glists_virt_base && lio->glists_virt_base[i]) {
+               if (lio->glists_virt_base && lio->glists_virt_base[i] &&
+                   lio->glists_dma_base && lio->glists_dma_base[i]) {
                        lio_dma_free(lio->oct_dev,
                                     lio->glist_entry_size * lio->tx_qsize,
                                     lio->glists_virt_base[i],

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index f72db33..e03855b 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -470,7 +470,8 @@ static void delete_glists(struct lio *lio)
                                kfree(g);
                } while (g);
 
-               if (lio->glists_virt_base && lio->glists_virt_base[i]) {
+               if (lio->glists_virt_base && lio->glists_virt_base[i] &&
+                   lio->glists_dma_base && lio->glists_dma_base[i]) {
                        lio_dma_free(lio->oct_dev,
                                     lio->glist_entry_size * lio->tx_qsize,
                                     lio->glists_virt_base[i],