From 5e1f91850365de55ca74945866c002fda8f00331 Mon Sep 17 00:00:00 2001
From: Fawzi Khaber <fawzi.khaber@tdk.com>
Date: Mon, 18 Jul 2022 15:07:06 +0200
Subject: [PATCH] iio: fix iio_format_avail_range() printing for none IIO_VAL_INT
Git-commit: 5e1f91850365de55ca74945866c002fda8f00331
Patch-mainline: v6.0-rc1
References: git-fixes

iio_format_avail_range() should print range as follow [min, step, max], so
the function was previously calling iio_format_list() with length = 3,
length variable refers to the array size of values not the number of
elements. In case of non IIO_VAL_INT values each element has integer part
and decimal part. With length = 3 this would cause premature end of loop
and result in printing only one element.

Signed-off-by: Fawzi Khaber <fawzi.khaber@tdk.com>
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Fixes: eda20ba1e25e ("iio: core: Consolidate iio_format_avail_{list,range}()")
Link: https://lore.kernel.org/r/20220718130706.32571-1-jmaneyrol@invensense.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/iio/industrialio-core.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 358b909298c0..0f4dbda3b9d3 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -812,7 +812,23 @@ static ssize_t iio_format_avail_list(char *buf, const int *vals,
 
 static ssize_t iio_format_avail_range(char *buf, const int *vals, int type)
 {
-	return iio_format_list(buf, vals, type, 3, "[", "]");
+	int length;
+
+	/*
+	 * length refers to the array size , not the number of elements.
+	 * The purpose is to print the range [min , step ,max] so length should
+	 * be 3 in case of int, and 6 for other types.
+	 */
+	switch (type) {
+	case IIO_VAL_INT:
+		length = 3;
+		break;
+	default:
+		length = 6;
+		break;
+	}
+
+	return iio_format_list(buf, vals, type, length, "[", "]");
 }
 
 static ssize_t iio_read_channel_info_avail(struct device *dev,
-- 
2.35.3