caif: checking the wrong variable

In the original code we check if (servl == NULL) twice.  The first time
should print the message that cfmuxl_remove_uplayer() failed and set
"ret" correctly, but instead it just returns success.  The second check
should be checking the value of "ret" instead of "servl".

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/net/caif/cfcnfg.c b/net/caif/cfcnfg.c
index 21ede141018a..c665de778b60 100644
--- a/net/caif/cfcnfg.c
+++ b/net/caif/cfcnfg.c
@@ -191,6 +191,7 @@ int cfcnfg_disconn_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer)
         struct cflayer *servl = NULL;
         struct cfcnfg_phyinfo *phyinfo = NULL;
         u8 phyid = 0;
+
         caif_assert(adap_layer != NULL);
         channel_id = adap_layer->id;
         if (adap_layer->dn == NULL || channel_id == 0) {
@@ -199,16 +200,16 @@ int cfcnfg_disconn_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer)
                 goto end;
         }
         servl = cfmuxl_remove_uplayer(cnfg->mux, channel_id);
-        if (servl == NULL)
-                goto end;
-        layer_set_up(servl, NULL);
-        ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
         if (servl == NULL) {
                 pr_err("PROTOCOL ERROR - Error removing service_layer Channel_Id(%d)",
                        channel_id);
                 ret = -EINVAL;
                 goto end;
         }
+        layer_set_up(servl, NULL);
+        ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
+        if (ret)
+                goto end;
         caif_assert(channel_id == servl->id);
         if (adap_layer->dn != NULL) {
                 phyid = cfsrvl_getphyid(adap_layer->dn);