[PATCH 3.17 050/122] iio: Fix IIO_EVENT_CODE_EXTRACT_DIR bit mask

From: Greg Kroah-Hartman
Date: Fri Dec 05 2014 - 18:46:36 EST


3.17-stable review patch. If anyone has any objections, please let me know.

------------------

From: Cristina Ciocan <cristina.ciocan@xxxxxxxxx>

commit ccf54555da9a5e91e454b909ca6a5303c7d6b910 upstream.

The direction field is set on 7 bits, thus we need to AND it with 0111 111 mask
in order to retrieve it, that is 0x7F, not 0xCF as it is now.

Fixes: ade7ef7ba (staging:iio: Differential channel handling)
Signed-off-by: Cristina Ciocan <cristina.ciocan@xxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
include/linux/iio/events.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/iio/events.h
+++ b/include/linux/iio/events.h
@@ -72,7 +72,7 @@ struct iio_event_data {

#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)

-#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0xCF)
+#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0x7F)

#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)



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