Commit 2cc412b5 authored Sep 14, 2012 by Kim, Milo Committed by Jonathan Cameron Sep 15, 2012

iio: inkern: allocate zeroed memory



 Use kzalloc() rather than kmalloc() for initializing the iio_channel structure.
 This patch enables the iio_dev and iio_chan_spec are set to NULL.
 This may prevent the page fault problem because the pointer of iio_chan_spec
 is initialized as NULL.

 The iio_chan_spec is updated only in case that the IIO map has
 specific channel label.
 When the map has no ADC channel label, then the value of iio_chan_spec
 remains as invalid pointer.
 To prevent this problem, the pointer should be initialized as NULL.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

parent 7985e7c1

drivers/iio/inkern.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -130,7 +130,7 @@ struct iio_channel iio_channel_get(const char name, const char *channel_name)
		if (c == NULL)
		return ERR_PTR(-ENODEV);

		channel = kmalloc(sizeof(*channel), GFP_KERNEL);
		channel = kzalloc(sizeof(*channel), GFP_KERNEL);
		if (channel == NULL)
		return ERR_PTR(-ENOMEM);