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authorMichael Hennerich <michael.hennerich@analog.com>2015-10-13 19:15:37 +0300
committerJonathan Cameron <jic23@kernel.org>2015-10-25 15:29:31 +0300
commit03fe472ef33b7f31fbd11d300dbb3fdab9c00fd4 (patch)
treec1054df232fb8142c751036f71abd323616db9df /drivers/iio/dac
parent01bb70ae0b98d266fa3e860482c7ce22fa482a6e (diff)
downloadlinux-03fe472ef33b7f31fbd11d300dbb3fdab9c00fd4.tar.xz
iio:ad5064: Make sure ad5064_i2c_write() returns 0 on success
i2c_master_send() returns the number of bytes transferred on success while the ad5064 driver expects that the write() callback returns 0 on success. Fix that by translating any non negative return value of i2c_master_send() to 0. Fixes: commit 6a17a0768f77 ("iio:dac:ad5064: Add support for the ad5629r and ad5669r") Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/dac')
-rw-r--r--drivers/iio/dac/ad5064.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c
index c067e6821496..7e7ebf30e954 100644
--- a/drivers/iio/dac/ad5064.c
+++ b/drivers/iio/dac/ad5064.c
@@ -598,10 +598,16 @@ static int ad5064_i2c_write(struct ad5064_state *st, unsigned int cmd,
unsigned int addr, unsigned int val)
{
struct i2c_client *i2c = to_i2c_client(st->dev);
+ int ret;
st->data.i2c[0] = (cmd << 4) | addr;
put_unaligned_be16(val, &st->data.i2c[1]);
- return i2c_master_send(i2c, st->data.i2c, 3);
+
+ ret = i2c_master_send(i2c, st->data.i2c, 3);
+ if (ret < 0)
+ return ret;
+
+ return 0;
}
static int ad5064_i2c_probe(struct i2c_client *i2c,