Messages in this thread Patch in this message | | | From | Colin King <> | Subject | [PATCH] iio: ensure ret is initialized to zero before entering do loop | Date | Mon, 5 Sep 2016 15:39:06 +0100 |
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From: Colin Ian King <colin.king@canonical.com>
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> --- drivers/iio/industrialio-buffer.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 49bf9c5..158aaf4 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; -- 2.9.3
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