Signed-off-by: Manuel Stahl <manuel.stahl@xxxxxxxxxxxxxxxxx>
---
drivers/staging/iio/industrialio-buffer.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/iio/industrialio-buffer.c b/drivers/staging/iio/industrialio-buffer.c
index f5c4999..c789d39 100644
--- a/drivers/staging/iio/industrialio-buffer.c
+++ b/drivers/staging/iio/industrialio-buffer.c
@@ -426,6 +426,17 @@ ssize_t iio_buffer_store_enable(struct device *dev,
goto done;
}
if (requested_state) {
+ if (buffer->access->get_length) {
+ ret = buffer->access->get_length(buffer);
+ if (ret <= 0) {
+ printk(KERN_INFO
+ "Buffer not started: "
+ "buffer length must be greater than zero\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ }
+
if (indio_dev->setup_ops->preenable) {
ret = indio_dev->setup_ops->preenable(indio_dev);
if (ret) {
--
1.7.3.rc1
--
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