ehea: Introduce the use of the managed version of kzalloc

This patch moves data allocated using kzalloc to managed data allocated using devm_kzalloc and cleans now unnecessary kfrees in probe and remove functions. Also, linux/device.h is added to make sure the devm_*() routine declarations are unambiguously available.

The following Coccinelle semantic patch was used for making the change:

@platform@
identifier p, probefn, removefn;
@@
struct platform_driver p = {
.probe = probefn,
.remove = removefn,
};

@prb@
identifier platform.probefn, pdev;
expression e, e1, e2;
@@
probefn(struct platform_device *pdev, ...) {
<+...
- e = kzalloc(e1, e2)
+ e = devm_kzalloc(&pdev->dev, e1, e2)
...
?-kfree(e);
...+>
}

@rem depends on prb@
identifier platform.removefn;
expression e;
@@
removefn(...) {
<...
- kfree(e);
...>
}

---
v3: add space in linux/device.h include

 drivers/net/ethernet/ibm/ehea/ehea_main.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

index 538903b..a0b418e 100644
@@ -28,6 +28,7 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <linux/device.h>
 #include <linux/in.h>
 #include <linux/ip.h>
 #include <linux/tcp.h>

@@ -3273,7 +3274,7 @@ static int ehea_probe_adapter(struct platform_device *dev)
 		return -EINVAL;
 	}
 
-	adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
+	adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
 	if (!adapter) {
 		ret = -ENOMEM;
 		dev_err(&dev->dev, "no mem for ehea_adapter\n");

@@ -3359,7 +3360,6 @@ out_kill_eq:
 
 out_free_ad:
 	list_del(&adapter->list);
-	kfree(adapter);
 
 out:
 	ehea_update_firmware_handles();

@@ -3386,7 +3386,6 @@ static int ehea_remove(struct platform_device *dev)
 	ehea_destroy_eq(adapter->neq);
 	ehea_remove_adapter_mr(adapter);
 	list_del(&adapter->list);
-	kfree(adapter);
 
 	ehea_update_firmware_handles();
 

1.9.1

From: Himangi Saraogi <[email protected]>
Date: Wed, 28 May 2014 19:53:09 +0530

...

Applied to net-next, thanks.