vxge: fix memory leak in vxge_alloc_msix() error path

When pci_enable_msix() returned ret<0, entries and vxge_entries were leaked.
While at it, use the centralized exit idiom in the function.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Ram Vepa <ram.vepa@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 20 insertions, 9 deletions

diff --git a/drivers/net/vxge/vxge-main.c b/drivers/net/vxge/vxge-main.c
index b504bd561362..d14e207de1df 100644
--- a/drivers/net/vxge/vxge-main.c
+++ b/drivers/net/vxge/vxge-main.c
@@ -2262,7 +2262,8 @@ start:
                 vxge_debug_init(VXGE_ERR,
                         "%s: memory allocation failed",
                         VXGE_DRIVER_NAME);
-                return  -ENOMEM;
+                ret = -ENOMEM;
+                goto alloc_entries_failed;
         }
 
         vdev->vxge_entries =
@@ -2271,8 +2272,8 @@ start:
         if (!vdev->vxge_entries) {
                 vxge_debug_init(VXGE_ERR, "%s: memory allocation failed",
                         VXGE_DRIVER_NAME);
-                kfree(vdev->entries);
-                return -ENOMEM;
+                ret = -ENOMEM;
+                goto alloc_vxge_entries_failed;
         }
 
         for (i = 0, j = 0; i < vdev->no_of_vpath; i++) {
@@ -2303,22 +2304,32 @@ start:
                 vxge_debug_init(VXGE_ERR,
                         "%s: MSI-X enable failed for %d vectors, ret: %d",
                         VXGE_DRIVER_NAME, vdev->intr_cnt, ret);
+                if ((max_config_vpath != VXGE_USE_DEFAULT) || (ret < 3)) {
+                        ret = -ENODEV;
+                        goto enable_msix_failed;
+                }
+
                 kfree(vdev->entries);
                 kfree(vdev->vxge_entries);
                 vdev->entries = NULL;
                 vdev->vxge_entries = NULL;
-
-                if ((max_config_vpath != VXGE_USE_DEFAULT) || (ret < 3))
-                        return -ENODEV;
                 /* Try with less no of vector by reducing no of vpaths count */
                 temp = (ret - 1)/2;
                 vxge_close_vpaths(vdev, temp);
                 vdev->no_of_vpath = temp;
                 goto start;
-        } else if (ret < 0)
-                return -ENODEV;
-
+        } else if (ret < 0) {
+                ret = -ENODEV;
+                goto enable_msix_failed;
+        }
         return 0;
+
+enable_msix_failed:
+        kfree(vdev->vxge_entries);
+alloc_vxge_entries_failed:
+        kfree(vdev->entries);
+alloc_entries_failed:
+        return ret;
 }
 
 static int vxge_enable_msix(struct vxgedev *vdev)