diff options
| author | Nuno Sá <nuno.sa@analog.com> | 2023-02-16 11:14:50 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-02-18 14:06:50 +0000 |
| commit | b5184a26a28fac1d708b0bfeeb958a9260c2924c (patch) | |
| tree | 2eb20785991c1da58a4de997c9befec1cf7f7e7b | |
| parent | 42ec40b0883c1cce58b06e8fa82049a61033151c (diff) | |
iio: buffer: correctly return bytes written in output buffers
If for some reason 'rb->access->write()' does not write the full
requested data and the O_NONBLOCK is set, we would return 'n' to
userspace which is not really truth. Hence, let's return the number of
bytes we effectively wrote.
Fixes: 9eeee3b0bf190 ("iio: Add output buffer support")
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20230216101452.591805-2-nuno.sa@analog.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 80c78bd6bbef..6340d8e1430b 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -220,7 +220,7 @@ static ssize_t iio_buffer_write(struct file *filp, const char __user *buf, } while (ret == 0); remove_wait_queue(&rb->pollq, &wait); - return ret < 0 ? ret : n; + return ret < 0 ? ret : written; } /** |