cxgb4: correctly handling failed allocation

Since t4_alloc_mem can be failed in memory pressure,
if not properly handled, NULL dereference could be happened.

Signed-off-by: Insu Yun <wuninsu@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c b/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c
index c308429dd9c7..11dd91e4db56 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c
@@ -295,6 +295,10 @@ struct clip_tbl *t4_init_clip_tbl(unsigned int clipt_start,
                 INIT_LIST_HEAD(&ctbl->hash_list[i]);
 
         cl_list = t4_alloc_mem(clipt_size*sizeof(struct clip_entry));
+        if (!cl_list) {
+                t4_free_mem(ctbl);
+                return NULL;
+        }
         ctbl->cl_list = (void *)cl_list;
 
         for (i = 0; i < clipt_size; i++) {