[PATCH] ieee802154: Introduce the use of the managed version of kzalloc

From: Himangi Saraogi
Date: Fri May 16 2014 - 14:09:53 EST


This patch moves data allocated using kzalloc to managed data allocated
using devm_kzalloc and cleans now unnecessary kfrees in probe and remove
functions.

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@xxxxxxxxx>
Acked-by: Julia Lawall <julia.lawall@xxxxxxx>
---
drivers/net/ieee802154/fakelb.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ieee802154/fakelb.c b/drivers/net/ieee802154/fakelb.c
index b8d2217..0bddcde 100644
--- a/drivers/net/ieee802154/fakelb.c
+++ b/drivers/net/ieee802154/fakelb.c
@@ -228,7 +228,8 @@ static int fakelb_probe(struct platform_device *pdev)
int err = -ENOMEM;
int i;

- priv = kzalloc(sizeof(struct fakelb_priv), GFP_KERNEL);
+ priv = devm_kzalloc(&pdev->dev, sizeof(struct fakelb_priv),
+ GFP_KERNEL);
if (!priv)
goto err_alloc;

@@ -248,7 +249,6 @@ static int fakelb_probe(struct platform_device *pdev)
err_slave:
list_for_each_entry(dp, &priv->list, list)
fakelb_del(dp);
- kfree(priv);
err_alloc:
return err;
}
@@ -260,7 +260,6 @@ static int fakelb_remove(struct platform_device *pdev)

list_for_each_entry_safe(dp, temp, &priv->list, list)
fakelb_del(dp);
- kfree(priv);

return 0;
}
--
1.9.1

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