[PATCH 5.19 297/717] drm/bridge: Avoid uninitialized variable warning

Greg Kroah-Hartman
2022-10-22T08:05:14Z

From: Dan Carpenter <dan.carpenter@oracle.com>

[ Upstream commit 7d1202738efda60155d98b370b3c70d336be0eea ]

This code works, but technically it uses "num_in_bus_fmts" before it
has been initialized so it leads to static checker warnings and probably
KMEMsan warnings at run time. Initialize the variable to zero to
silence the warning.

Fixes: f32df58acc68 ("drm/bridge: Add the necessary bits to support bus format negotiation")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/YrrIs3hoGcPVmXc5@kili
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/drm_bridge.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index c96847fc0ebc..36ca4092c1ab 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -823,8 +823,8 @@ static int select_bus_fmt_recursive(struct drm_bridge *first_bridge,
struct drm_connector_state *conn_state,
u32 out_bus_fmt)
{
+ unsigned int i, num_in_bus_fmts = 0;
struct drm_bridge_state *cur_state;
- unsigned int num_in_bus_fmts, i;
struct drm_bridge *prev_bridge;
u32 *in_bus_fmts;
int ret;
@@ -945,7 +945,7 @@ drm_atomic_bridge_chain_select_bus_fmts(struct drm_bridge *bridge,
struct drm_connector *conn = conn_state->connector;
struct drm_encoder *encoder = bridge->encoder;
struct drm_bridge_state *last_bridge_state;
- unsigned int i, num_out_bus_fmts;
+ unsigned int i, num_out_bus_fmts = 0;
struct drm_bridge *last_bridge;
u32 *out_bus_fmts;
int ret = 0;
--
2.35.1