Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1531730

[PATCH] iio: 104-quad-8: Fix off-by-one errors when addressing IOR

Show all headers | View raw

The Input/Output Control register (IOR) is offset by 1 from the
respective channel data register. This patch fixes off-by-one errors
when attempting to write to a channel IOR where the base address was not
properly offset.

Fixes: 28e5d3bb0325 ("iio: 104-quad-8: Add IIO support for the ACCES 104-QUAD-8")
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
---
 drivers/iio/counter/104-quad-8.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/counter/104-quad-8.c b/drivers/iio/counter/104-quad-8.c
index 2d2ee35..412d283 100644
--- a/drivers/iio/counter/104-quad-8.c
+++ b/drivers/iio/counter/104-quad-8.c
@@ -153,7 +153,7 @@ static int quad8_write_raw(struct iio_dev *indio_dev,
 		ior_cfg = val | priv->preset_enable[chan->channel] << 1;
 
 		/* Load I/O control configuration */
-		outb(0x40 | ior_cfg, base_offset);
+		outb(0x40 | ior_cfg, base_offset + 1);
 
 		return 0;
 	case IIO_CHAN_INFO_SCALE:
@@ -241,7 +241,7 @@ static ssize_t quad8_write_set_to_preset_on_index(struct iio_dev *indio_dev,
 	size_t len)
 {
 	struct quad8_iio *const priv = iio_priv(indio_dev);
-	const int base_offset = priv->base + 2 * chan->channel;
+	const int base_offset = priv->base + 2 * chan->channel + 1;
 	bool preset_enable;
 	int ret;
 	unsigned int ior_cfg;
-- 
2.10.2

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH] iio: 104-quad-8: Fix off-by-one errors when addressing IOR William Breathitt Gray <vilhelm.gray@gmail.com> - 2016-11-28 23:00 +0100
  Re: [PATCH] iio: 104-quad-8: Fix off-by-one errors when addressing  IOR Jonathan Cameron <jic23@kernel.org> - 2016-12-03 15:50 +0100

csiph-web