iSCSI-target: Use common error handling code in iscsi_decode_text_input()

Add a jump target so that a bit of exception handling can be better reused
at the end of this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 18 insertions, 21 deletions

diff --git a/drivers/target/iscsi/iscsi_target_parameters.c b/drivers/target/iscsi/iscsi_target_parameters.c
index caab1045742d..29a37b242d30 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.c
+++ b/drivers/target/iscsi/iscsi_target_parameters.c
@@ -1380,10 +1380,8 @@ int iscsi_decode_text_input(
                 char *key, *value;
                 struct iscsi_param *param;
 
-                if (iscsi_extract_key_value(start, &key, &value) < 0) {
-                        kfree(tmpbuf);
-                        return -1;
-                }
+                if (iscsi_extract_key_value(start, &key, &value) < 0)
+                        goto free_buffer;
 
                 pr_debug("Got key: %s=%s\n", key, value);
 
@@ -1396,38 +1394,37 @@ int iscsi_decode_text_input(
 
                 param = iscsi_check_key(key, phase, sender, param_list);
                 if (!param) {
-                        if (iscsi_add_notunderstood_response(key,
-                                        value, param_list) < 0) {
-                                kfree(tmpbuf);
-                                return -1;
-                        }
+                        if (iscsi_add_notunderstood_response(key, value,
+                                                             param_list) < 0)
+                                goto free_buffer;
+
                         start += strlen(key) + strlen(value) + 2;
                         continue;
                 }
-                if (iscsi_check_value(param, value) < 0) {
-                        kfree(tmpbuf);
-                        return -1;
-                }
+                if (iscsi_check_value(param, value) < 0)
+                        goto free_buffer;
 
                 start += strlen(key) + strlen(value) + 2;
 
                 if (IS_PSTATE_PROPOSER(param)) {
-                        if (iscsi_check_proposer_state(param, value) < 0) {
-                                kfree(tmpbuf);
-                                return -1;
-                        }
+                        if (iscsi_check_proposer_state(param, value) < 0)
+                                goto free_buffer;
+
                         SET_PSTATE_RESPONSE_GOT(param);
                 } else {
-                        if (iscsi_check_acceptor_state(param, value, conn) < 0) {
-                                kfree(tmpbuf);
-                                return -1;
-                        }
+                        if (iscsi_check_acceptor_state(param, value, conn) < 0)
+                                goto free_buffer;
+
                         SET_PSTATE_ACCEPTOR(param);
                 }
         }
 
         kfree(tmpbuf);
         return 0;
+
+free_buffer:
+        kfree(tmpbuf);
+        return -1;
 }
 
 int iscsi_encode_text_output(