usb: musb: davinci: use devm_ functions.

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, a label is done away with and clk_get is replaced by it
corresponding devm version and the clk_puts are done away with. The
labels are renamed to make them ordered.

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>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index de8492b..110b784 100644 (file)
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -519,23 +519,23 @@ static int davinci_probe(struct platform_device *pdev)
 
        int                             ret = -ENOMEM;
 
-       glue = kzalloc(sizeof(*glue), GFP_KERNEL);
+       glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
        if (!glue) {
                dev_err(&pdev->dev, "failed to allocate glue context\n");
                goto err0;
        }
 
-       clk = clk_get(&pdev->dev, "usb");
+       clk = devm_clk_get(&pdev->dev, "usb");
        if (IS_ERR(clk)) {
                dev_err(&pdev->dev, "failed to get clock\n");
                ret = PTR_ERR(clk);
-               goto err3;
+               goto err0;
        }
 
        ret = clk_enable(clk);
        if (ret) {
                dev_err(&pdev->dev, "failed to enable clock\n");
-               goto err4;
+               goto err0;
        }
 
        glue->dev                       = &pdev->dev;
@@ -579,20 +579,14 @@ static int davinci_probe(struct platform_device *pdev)
        if (IS_ERR(musb)) {
                ret = PTR_ERR(musb);
                dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
-               goto err5;
+               goto err1;
        }
 
        return 0;
 
-err5:
+err1:
        clk_disable(clk);
 
-err4:
-       clk_put(clk);
-
-err3:
-       kfree(glue);
-
 err0:
        return ret;
 }
@@ -604,8 +598,6 @@ static int davinci_remove(struct platform_device *pdev)
        platform_device_unregister(glue->musb);
        usb_phy_generic_unregister();
        clk_disable(glue->clk);
-       clk_put(glue->clk);
-       kfree(glue);
 
        return 0;
 }