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);
  ...>
}

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Compile-Tested-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 538903bf13bc..a0b418e007a0 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -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();