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ASoC: ux500_msp_i2s: better use devm functions and fix error return code 

Remove unnecessary calls to devm_kfree and replace iounmap by devm_iounmap
(and use resource_size for the third argument).  These changes make it
possible to remove the error-handling code at the end of
ux500_msp_i2s_init_msp, and all of the gotos become direct returns.

In the case of the second call to devm_kzalloc, the return variable ret was
not initialized.  Here it is changed to a direct return of -ENOMEM.

A simplified version of the semantic match that finds the second problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Julia Lawall 2012-08-19 09:02:53 +02:00 committed by Mark Brown
parent db8b624d55
commit b18e93a493
1 changed files with 5 additions and 20 deletions
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25
sound/soc/ux500/ux500_msp_i2s.c
View File

@ -663,7 +663,6 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
struct ux500_msp **msp_p,
struct msp_i2s_platform_data *platform_data)
{
int ret = 0;
struct resource *res = NULL;
struct i2s_controller *i2s_cont;
struct ux500_msp *msp;
@ -685,15 +684,14 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
if (res == NULL) {
dev_err(&pdev->dev, "%s: ERROR: Unable to get resource!\n",
__func__);
ret = -ENOMEM;
goto err_res;
return -ENOMEM;
}
msp->registers = ioremap(res->start, (res->end - res->start + 1));
msp->registers = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (msp->registers == NULL) {
dev_err(&pdev->dev, "%s: ERROR: ioremap failed!\n", __func__);
ret = -ENOMEM;
goto err_res;
return -ENOMEM;
}
msp->msp_state = MSP_STATE_IDLE;
@ -705,7 +703,7 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
dev_err(&pdev->dev,
"%s: ERROR: Failed to allocate I2S-controller!\n",
__func__);
goto err_i2s_cont;
return -ENOMEM;
}
i2s_cont->dev.parent = &pdev->dev;
i2s_cont->data = (void *)msp;
@ -716,14 +714,6 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
msp->i2s_cont = i2s_cont;
return 0;
err_i2s_cont:
iounmap(msp->registers);
err_res:
devm_kfree(&pdev->dev, msp);
return ret;
}
void ux500_msp_i2s_cleanup_msp(struct platform_device *pdev,
@ -732,11 +722,6 @@ void ux500_msp_i2s_cleanup_msp(struct platform_device *pdev,
dev_dbg(msp->dev, "%s: Enter (id = %d).\n", __func__, msp->id);
device_unregister(&msp->i2s_cont->dev);
devm_kfree(&pdev->dev, msp->i2s_cont);
iounmap(msp->registers);
devm_kfree(&pdev->dev, msp);
}
MODULE_LICENSE("GPL v2");