From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit 4f3bcd878f1d3c730fe00f619b7260c6125d49eb upstream.
at91_adc_get_trigger_value_by_name() was returning -ENOMEM truncated to
a positive u8 and that doesn't work. I've changed it to int and
refactored it to preserve the error code.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Tested-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/iio/adc/at91_adc.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 0f16b553e063..b023cd3fe4f1 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -166,12 +166,11 @@ static int at91_adc_channel_init(struct iio_dev *idev)
return idev->num_channels;
}
-static u8 at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
+static int at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
struct at91_adc_trigger *triggers,
const char *trigger_name)
{
struct at91_adc_state *st = iio_priv(idev);
- u8 value = 0;
int i;
for (i = 0; i < st->trigger_number; i++) {
@@ -184,15 +183,16 @@ static u8 at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
return -ENOMEM;
if (strcmp(trigger_name, name) == 0) {
- value = triggers[i].value;
kfree(name);
- break;
+ if (triggers[i].value == 0)
+ return -EINVAL;
+ return triggers[i].value;
}
kfree(name);
}
- return value;
+ return -EINVAL;
}
static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
@@ -202,14 +202,14 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
struct iio_buffer *buffer = idev->buffer;
struct at91_adc_reg_desc *reg = st->registers;
u32 status = at91_adc_readl(st, reg->trigger_register);
- u8 value;
+ int value;
u8 bit;
value = at91_adc_get_trigger_value_by_name(idev,
st->trigger_list,
idev->trig->name);
- if (value == 0)
- return -EINVAL;
+ if (value < 0)
+ return value;
if (state) {
st->buffer = kmalloc(idev->scan_bytes, GFP_KERNEL);
--
2.0.0
--
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