redonkable/alistair23-linux
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staging: comedi: drivers: introduce comedi_alloc_devpriv()

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Introduce a helper function to allocate memory and set the
comedi_device private data pointer.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-06-24 16:55:14 -07:00 committed by Greg Kroah-Hartman
parent b0d67ac777
commit 54db996e6d
2 changed files with 13 additions and 0 deletions
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1
drivers/staging/comedi/comedidev.h
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@ -357,6 +357,7 @@ void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
/* drivers.c - general comedi driver functions */
void *comedi_alloc_devpriv(struct comedi_device *, size_t);
int comedi_alloc_subdevices(struct comedi_device *, int);
int comedi_load_firmware(struct comedi_device *, struct device *,

12
drivers/staging/comedi/drivers.c
View file

@ -57,6 +57,18 @@ static void comedi_clear_hw_dev(struct comedi_device *dev)
dev->hw_dev = NULL;
}
/**
* comedi_alloc_devpriv() - Allocate memory for the device private data.
* @dev: comedi_device struct
* @size: size of the memory to allocate
*/
void *comedi_alloc_devpriv(struct comedi_device *dev, size_t size)
{
dev->private = kzalloc(size, GFP_KERNEL);
return dev->private;
}
EXPORT_SYMBOL_GPL(comedi_alloc_devpriv);
int comedi_alloc_subdevices(struct comedi_device *dev, int num_subdevices)
{
struct comedi_subdevice *s;