[PATCH 2/4] SCSI-QLA4...: Less function calls in qla4xxx_is_session_exists() after error detection

[SF Markus Elfring]

From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 6 Feb 2015 21:14:40 +0100

The vfree() function was called in two cases by the qla4xxx_is_session_exists()
function during error handling even if the passed variables "fw_tddb" and
"tmp_tddb" contained still a null pointer.

* This implementation detail could be improved by adjustments for jump labels.

* Let us return immediately after the first failed function call according to
  the current Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---
 drivers/scsi/qla4xxx/ql4_os.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 2a00fd3..a7ca479 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -6327,17 +6327,15 @@ static int qla4xxx_is_session_exists(struct scsi_qla_host *ha,
 				     uint32_t *index)
 {
 	struct ddb_entry *ddb_entry;
-	struct ql4_tuple_ddb *fw_tddb = NULL;
-	struct ql4_tuple_ddb *tmp_tddb = NULL;
 	int idx;
 	int ret = QLA_ERROR;
+	struct ql4_tuple_ddb *tmp_tddb;
+	struct ql4_tuple_ddb *fw_tddb = vzalloc(sizeof(*fw_tddb));
 
-	fw_tddb = vzalloc(sizeof(*fw_tddb));
 	if (!fw_tddb) {
 		DEBUG2(ql4_printk(KERN_WARNING, ha,
 				  "Memory Allocation failed.\n"));
-		ret = QLA_SUCCESS;
-		goto exit_check;
+		return QLA_SUCCESS;
 	}
 
 	tmp_tddb = vzalloc(sizeof(*tmp_tddb));
@@ -6345,7 +6343,7 @@ static int qla4xxx_is_session_exists(struct scsi_qla_host *ha,
 		DEBUG2(ql4_printk(KERN_WARNING, ha,
 				  "Memory Allocation failed.\n"));
 		ret = QLA_SUCCESS;
-		goto exit_check;
+		goto free_fw;
 	}
 
 	qla4xxx_convert_param_ddb(fw_ddb_entry, fw_tddb, NULL);
@@ -6360,13 +6358,14 @@ static int qla4xxx_is_session_exists(struct scsi_qla_host *ha,
 			ret = QLA_SUCCESS; /* found */
 			if (index != NULL)
 				*index = idx;
-			goto exit_check;
+			goto free_tmp;
 		}
 	}
 
-exit_check:
-	vfree(fw_tddb);
+free_tmp:
 	vfree(tmp_tddb);
+free_fw:
+	vfree(fw_tddb);
 	return ret;
 }
 
-- 
2.2.2

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