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path: root/drivers/iio/buffer/industrialio-triggered-buffer.c
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Diffstat (limited to 'drivers/iio/buffer/industrialio-triggered-buffer.c')
-rw-r--r--drivers/iio/buffer/industrialio-triggered-buffer.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/iio/buffer/industrialio-triggered-buffer.c b/drivers/iio/buffer/industrialio-triggered-buffer.c
index c7671b1f5ead..c06515987e7a 100644
--- a/drivers/iio/buffer/industrialio-triggered-buffer.c
+++ b/drivers/iio/buffer/industrialio-triggered-buffer.c
@@ -46,6 +46,16 @@ int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev,
struct iio_buffer *buffer;
int ret;
+ /*
+ * iio_triggered_buffer_cleanup() assumes that the buffer allocated here
+ * is assigned to indio_dev->buffer but this is only the case if this
+ * function is the first caller to iio_device_attach_buffer(). If
+ * indio_dev->buffer is already set then we can't proceed otherwise the
+ * cleanup function will try to free a buffer that was not allocated here.
+ */
+ if (indio_dev->buffer)
+ return -EADDRINUSE;
+
buffer = iio_kfifo_allocate();
if (!buffer) {
ret = -ENOMEM;