From 00053566385e3e7a2f81f0fd2fa09bccce1589f2 Mon Sep 17 00:00:00 2001
From: Brian Masney <masneyb@onstation.org>
Date: Mon, 26 Sep 2016 20:20:20 -0400
Subject: [PATCH] staging: iio: isl29018: check if the chip is in a suspended
state
Add a check to isl29018_write_raw() to ensure that the chip is not in a
suspended state. This makes the code consistent with what is present
in isl29018_read_raw().
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---
drivers/staging/iio/light/isl29018.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/iio/light/isl29018.c b/drivers/staging/iio/light/isl29018.c
index 3a4d79d7e23c7..51226bd337c59 100644
--- a/drivers/staging/iio/light/isl29018.c
+++ b/drivers/staging/iio/light/isl29018.c
@@ -355,6 +355,10 @@ static int isl29018_write_raw(struct iio_dev *indio_dev,
int ret = -EINVAL;
mutex_lock(&chip->lock);
+ if (chip->suspended) {
+ ret = -EBUSY;
+ goto write_done;
+ }
switch (mask) {
case IIO_CHAN_INFO_CALIBSCALE:
if (chan->type == IIO_LIGHT) {
@@ -374,8 +378,9 @@ static int isl29018_write_raw(struct iio_dev *indio_dev,
default:
break;
}
- mutex_unlock(&chip->lock);
+write_done:
+ mutex_unlock(&chip->lock);
return ret;
}
--
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