Commit 08ce9b44 authored by Jonathan Cameron's avatar Jonathan Cameron
Browse files

iio:kfifo_buf improve error handling in read_first_n. 



These two elements were originally in the patch
iio:kfifo_buf  Take advantage of the fixed record size used in IIO
but Lars-Peter Clausen pointed out they should not have been
so here they are.

Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
Tested-by: default avatarLars-Peter Clausen <lars@metafoo.de>
parent c559afbf

drivers/iio/kfifo_buf.c

+3 −1
Original line number Diff line number Diff line
@@ -108,10 +108,12 @@ static int iio_read_first_n_kfifo(struct iio_buffer *r, 
	int ret, copied;

	struct iio_kfifo *kf = iio_to_kfifo(r);



	if (n < r->bytes_per_datum)

	if (n < r->bytes_per_datum || r->bytes_per_datum == 0)

		return -EINVAL;



	ret = kfifo_to_user(&kf->kf, buf, n, &copied);

	if (ret < 0)

		return ret;



	return copied;

}