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mfd: Fix memleak in pcf50633_client_dev_register

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Since platform_device_add_data copies the passed data, the allocated
subdev_pdata is never freed. A simple fix would be to either free subdev_pdata
or put it onto the stack. But since the pcf50633 child devices can rely on
beeing children of the pcf50633 core device it's much more elegant to get access
to pcf50633 core structure through that link. This allows to get completly rid
of pcf5033_subdev_pdata.

Signed-off-by: Lars-Peter Clausen <[email protected]>
Signed-off-by: Paul Fertser <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
This commit is contained in:
Lars-Peter Clausen 2009-10-14 02:12:33 +04:00 • committed by Samuel Ortiz
commit 68d641efd8
6 changed files with 12 additions and 28 deletions
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5
drivers/mfd/pcf50633-adc.c
View file

@ -209,17 +209,16 @@ static void pcf50633_adc_irq(int irq, void *data)
static int __devinit pcf50633_adc_probe(struct platform_device *pdev)
{
struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data;
struct pcf50633_adc *adc;
adc = kzalloc(sizeof(*adc), GFP_KERNEL);
if (!adc)
return -ENOMEM;
adc->pcf = pdata->pcf;
adc->pcf = dev_to_pcf50633(pdev->dev.parent);
platform_set_drvdata(pdev, adc);
pcf50633_register_irq(pdata->pcf, PCF50633_IRQ_ADCRDY,
pcf50633_register_irq(adc->pcf, PCF50633_IRQ_ADCRDY,
pcf50633_adc_irq, adc);
mutex_init(&adc->queue_mutex);

10
drivers/mfd/pcf50633-core.c
View file

@ -456,7 +456,6 @@ static void
pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
struct platform_device **pdev)
{
struct pcf50633_subdev_pdata *subdev_pdata;
int ret;
*pdev = platform_device_alloc(name, -1);
@ -465,15 +464,6 @@ pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
return;
}
subdev_pdata = kmalloc(sizeof(*subdev_pdata), GFP_KERNEL);
if (!subdev_pdata) {
dev_err(pcf->dev, "Error allocating subdev pdata\n");
platform_device_put(*pdev);
}
subdev_pdata->pcf = pcf;
platform_device_add_data(*pdev, subdev_pdata, sizeof(*subdev_pdata));
(*pdev)->dev.parent = pcf->dev;
ret = platform_device_add(*pdev);