From 2755551188d240f0098cdc6f1a2984f8a1785689 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Mon, 29 May 2017 19:57:19 -0700 Subject: [PATCH] Input: synaptics - clear device info before filling in synaptics_query_hardware() was being passed a 'struct synaptics_device_info' in uninitialized stack memory, then not always initializing all fields. This caused garbage to show up in certain fields, making the touchpad unusable. Fix by zeroing the device info, so all fields default to 0. Fixes: 6c53694fb222 ("Input: synaptics - split device info into a separate structure") Signed-off-by: Eric Biggers Signed-off-by: Dmitry Torokhov --- drivers/input/mouse/synaptics.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 131df9d3660f..4f97970abc94 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -397,6 +397,8 @@ static int synaptics_query_hardware(struct psmouse *psmouse, { int error; + memset(info, 0, sizeof(*info)); + error = synaptics_identify(psmouse, info); if (error) return error; -- 2.20.1