omap_w1_read_byte() should return -1 (or 0xff) in case of
error (e.g. missing battery).
The code accidentially overwrites the variable ret and not val,
which is returned. So it will return the initial value 0 instead
of -1.
Fixes: 27d13da8782a ("w1: omap-hdq: Simplify driver with PM runtime autosuspend")
Cc: stable@xxxxxxxxxxxxxxx # v5.6+
Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
---
drivers/w1/masters/omap_hdq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/w1/masters/omap_hdq.c b/drivers/w1/masters/omap_hdq.c
index d363e2a89fdfc4..9f9ec108b189e2 100644
--- a/drivers/w1/masters/omap_hdq.c
+++ b/drivers/w1/masters/omap_hdq.c
@@ -464,7 +464,7 @@ static u8 omap_w1_read_byte(void *_hdq)
ret = hdq_read_byte(hdq_data, &val);
if (ret)
- ret = -1;
+ val = -1;
pm_runtime_mark_last_busy(hdq_data->dev);
pm_runtime_put_autosuspend(hdq_data->dev);
--
2.26.2
