[dpdk-dev] [PATCH v3]/driver/raw/ifpga_rawdev: fix a memory leak bug in ifpga

AndyPei andy.pei at intel.com
Tue Dec 25 15:02:04 CET 2018


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.

What is different in v3 from v2 is that the adapter is no longer need to be freed.

fixes:ef1e8ede3da5
cc: rosen.xu at intel.com
cc: tianfei.zhang at intel.com

Signed-off-by: AndyPei <andy.pei at intel.com>
---
 drivers/raw/ifpga_rawdev/base/opae_hw_api.c | 32 ++++++++++++++++++++++++-----
 drivers/raw/ifpga_rawdev/base/opae_hw_api.h |  3 ++-
 drivers/raw/ifpga_rawdev/ifpga_rawdev.c     | 12 ++++-------
 3 files changed, 33 insertions(+), 14 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..50f6438 100644
--- a/drivers/raw/ifpga_rawdev/base/opae_hw_api.c
+++ b/drivers/raw/ifpga_rawdev/base/opae_hw_api.c
@@ -303,12 +303,35 @@ 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
+ * @adpdate: pointer of opae_adater data structure
+ * @name: adapter name.
+ * @data: private data of this adapter.
+ *
+ * Return: 0 on success.
+ */
+int opae_adapter_init(struct opae_adapter *adapter,
+		const char *name, void *data)
+{
+	if (!adapter)
+		return -ENOMEM;
+
+	TAILQ_INIT(&adapter->acc_list);
+	adapter->data = data;
+	adapter->name = name;
+	adapter->ops = match_ops(adapter);
+
+	return 0;
+}
+
+/**
+ * opae_adapter_alloc - alloc opae_adapter data structure
  * @name: adapter name.
  * @data: private data of this adapter.
  *
  * Return: opae_adapter on success, otherwise NULL.
  */
+ /**This function will no longer be called.
 struct opae_adapter *opae_adapter_alloc(const char *name, void *data)
 {
 	struct opae_adapter *adapter = opae_zmalloc(sizeof(*adapter));
@@ -316,13 +339,12 @@ struct opae_adapter *opae_adapter_alloc(const char *name, void *data)
 	if (!adapter)
 		return NULL;
 
-	TAILQ_INIT(&adapter->acc_list);
-	adapter->data = data;
-	adapter->name = name;
-	adapter->ops = match_ops(adapter);
+	if (opae_adapter_init(adapter, name, data))
+		return NULL;
 
 	return adapter;
 }
+**/
 
 /**
  * opae_adapter_enumerate - enumerate this adapter
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



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