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authorColin Ian King <colin.king@canonical.com>2016-09-05 17:39:06 +0300
committerJonathan Cameron <jic23@kernel.org>2016-09-05 23:00:14 +0300
commit5dba4b14bafe801083d01e1f400816df7e5a8f2e (patch)
tree96fafd56a772bf8f6d7ea6c562b484f92e091552 /drivers/iio/industrialio-buffer.c
parent307fe9dd11ae44d4f8881ee449a7cbac36e1f5de (diff)
downloadlinux-5dba4b14bafe801083d01e1f400816df7e5a8f2e.tar.xz
iio: ensure ret is initialized to zero before entering do loop
A recent fix to iio_buffer_read_first_n_outer removed ret from being set by a return from wait_event_interruptible and also added a continue in a loop which causes the variable ret to not be set when it reaches the end of the loop. Fix this by initializing ret to zero. Also remove extraneous white space at the end of the loop. Fixes: fcf68f3c0bb2a5 ("fix sched WARNING "do not call blocking ops when !TASK_RUNNING") Signed-off-by: Colin Ian King <colin.king@canonical.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/industrialio-buffer.c')
-rw-r--r--drivers/iio/industrialio-buffer.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 49bf9c59f117..158aaf44dd95 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -110,7 +110,7 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
DEFINE_WAIT_FUNC(wait, woken_wake_function);
size_t datum_size;
size_t to_wait;
- int ret;
+ int ret = 0;
if (!indio_dev->info)
return -ENODEV;
@@ -153,7 +153,7 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
ret = rb->access->read_first_n(rb, n, buf);
if (ret == 0 && (filp->f_flags & O_NONBLOCK))
ret = -EAGAIN;
- } while (ret == 0);
+ } while (ret == 0);
remove_wait_queue(&rb->pollq, &wait);
return ret;