From 0eda1d315505819a5497abd6e9873c02b4198492 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Wed, 2 Nov 2011 09:40:00 +0100
Subject: [PATCH] --- yaml --- r: 281007 b: refs/heads/master c:
 43c0364551d3ca0042f6f6a3da701edf1143d62f h: refs/heads/master i:   281005:
 cd8e0fc71f2b674be6e106d864524795c12e03c2   281003:
 99d73d5d29f7e3dec062ef544de2b41f60b80af9   280999:
 f1c445c29f368de3a7d001f8e7ff26d3373a8903   280991:
 dcc3b861fcf7b412bee342263b0e20c0deee0752 v: v3

---
 [refs]                                        | 2 +-
 trunk/drivers/staging/iio/industrialio-core.c | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 1fbf8323b1a1..46c00948ef2a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 685e010748f64a752a981254101e976d7291d16c
+refs/heads/master: 43c0364551d3ca0042f6f6a3da701edf1143d62f
diff --git a/trunk/drivers/staging/iio/industrialio-core.c b/trunk/drivers/staging/iio/industrialio-core.c
index dc2339ae63d0..0b671663b55d 100644
--- a/trunk/drivers/staging/iio/industrialio-core.c
+++ b/trunk/drivers/staging/iio/industrialio-core.c
@@ -790,6 +790,9 @@ static ssize_t iio_ev_value_store(struct device *dev,
 	unsigned long val;
 	int ret;
 
+	if (!indio_dev->info->write_event_value)
+		return -EINVAL;
+
 	ret = strict_strtoul(buf, 10, &val);
 	if (ret)
 		return ret;