diff options
author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2013-06-24 23:55:14 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-23 21:04:59 (GMT) |
commit | 54db996e6dab51571718e8e97c26fdc695e254ac (patch) | |
tree | 807414f92945a7243df7f089fcdeb87bebf390e5 /drivers | |
parent | b0d67ac7771683b08a29fc21101e785a724cb7a6 (diff) | |
download | linux-fsl-qoriq-54db996e6dab51571718e8e97c26fdc695e254ac.tar.xz |
staging: comedi: drivers: introduce comedi_alloc_devpriv()
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>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/staging/comedi/comedidev.h | 1 | ||||
-rw-r--r-- | drivers/staging/comedi/drivers.c | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index b75915f..bfbe416 100644 --- a/drivers/staging/comedi/comedidev.h +++ b/drivers/staging/comedi/comedidev.h @@ -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 *, diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c index e25eba5..87df796 100644 --- a/drivers/staging/comedi/drivers.c +++ b/drivers/staging/comedi/drivers.c @@ -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; |