[dpdk-dev] [DPDK] raw/ifpga: fix a memory leak bug in /driver/raw/ifpga_rawdev

[Andy Pei]

When ifpga_rawdev_create() allocate memory for a new rawdev, 
the original code allocate redundant memory for adapter, 
which is a member of the rawdev. What is actually necessary is 
the adapter to be initialized, not memory allocated.

Fixes: ef1e8ede3da5 ("raw/ifpga: add Intel FPGA bus rawdev driver")
Cc: andy.pei at intel.com
Cc: rosen.xu at intel.com

Signed-off-by: Andy Pei <andy.pei at intel.com>
---
 drivers/raw/ifpga_rawdev/base/opae_hw_api.c | 14 +++++++-------
 drivers/raw/ifpga_rawdev/base/opae_hw_api.h |  3 ++-
 drivers/raw/ifpga_rawdev/ifpga_rawdev.c     | 12 ++++--------
 3 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/drivers/raw/ifpga_rawdev/base/opae_hw_api.c b/drivers/raw/ifpga_rawdev/base/opae_hw_api.c
index a533dfe..1541b67 100644
--- a/drivers/raw/ifpga_rawdev/base/opae_hw_api.c
+++ b/drivers/raw/ifpga_rawdev/base/opae_hw_api.c
@@ -303,25 +303,25 @@ static struct opae_adapter_ops *match_ops(struct opae_adapter *adapter)
 }
 
 /**
- * opae_adapter_data_alloc - alloc opae_adapter_data data structure
+ * opae_adapter_init - init opae_adapter data structure
+ * @adapter: pointer of opae_adapter data structure
  * @name: adapter name.
  * @data: private data of this adapter.
  *
- * Return: opae_adapter on success, otherwise NULL.
+ * Return: 0 on success.
  */
-struct opae_adapter *opae_adapter_alloc(const char *name, void *data)
+int opae_adapter_init(struct opae_adapter *adapter,
+		const char *name, void *data)
 {
-	struct opae_adapter *adapter = opae_zmalloc(sizeof(*adapter));
-
 	if (!adapter)
-		return NULL;
+		return -ENOMEM;
 
 	TAILQ_INIT(&adapter->acc_list);
 	adapter->data = data;
 	adapter->name = name;
 	adapter->ops = match_ops(adapter);
 
-	return adapter;
+	return 0;
 }
 
 /**
diff --git a/drivers/raw/ifpga_rawdev/base/opae_hw_api.h b/drivers/raw/ifpga_rawdev/base/opae_hw_api.h
index 4bbc9df..332e0f3 100644
--- a/drivers/raw/ifpga_rawdev/base/opae_hw_api.h
+++ b/drivers/raw/ifpga_rawdev/base/opae_hw_api.h
@@ -225,7 +225,8 @@ struct opae_adapter {
 void *opae_adapter_data_alloc(enum opae_adapter_type type);
 #define opae_adapter_data_free(data) opae_free(data)
 
-struct opae_adapter *opae_adapter_alloc(const char *name, void *data);
+int opae_adapter_init(struct opae_adapter *adapter,
+		const char *name, void *data);
 #define opae_adapter_free(adapter) opae_free(adapter)
 
 int opae_adapter_enumerate(struct opae_adapter *adapter);
diff --git a/drivers/raw/ifpga_rawdev/ifpga_rawdev.c b/drivers/raw/ifpga_rawdev/ifpga_rawdev.c
index 32e318f..da772d0 100644
--- a/drivers/raw/ifpga_rawdev/ifpga_rawdev.c
+++ b/drivers/raw/ifpga_rawdev/ifpga_rawdev.c
@@ -409,9 +409,10 @@
 	data->device_id = pci_dev->id.device_id;
 	data->vendor_id = pci_dev->id.vendor_id;
 
+	adapter = rawdev->dev_private;
 	/* create a opae_adapter based on above device data */
-	adapter = opae_adapter_alloc(pci_dev->device.name, data);
-	if (!adapter) {
+	ret = opae_adapter_init(adapter, pci_dev->device.name, data);
+	if (ret) {
 		ret = -ENOMEM;
 		goto free_adapter_data;
 	}
@@ -420,12 +421,10 @@
 	rawdev->device = &pci_dev->device;
 	rawdev->driver_name = pci_dev->device.driver->name;
 
-	rawdev->dev_private = adapter;
-
 	/* must enumerate the adapter before use it */
 	ret = opae_adapter_enumerate(adapter);
 	if (ret)
-		goto free_adapter;
+		goto free_adapter_data;
 
 	/* get opae_manager to rawdev */
 	mgr = opae_adapter_get_mgr(adapter);
@@ -436,9 +435,6 @@
 
 	return ret;
 
-free_adapter:
-	if (adapter)
-		opae_adapter_free(adapter);
 free_adapter_data:
 	if (data)
 		opae_adapter_data_free(data);
-- 
1.8.3.1