drm/bridge: Avoid uninitialized variable warning

[ 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>

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 7ee29f07385787df5f0f1dcd1e2ee38acb5a889b..78bc315b0b737b9d573b00391cda3e2e3773d55c 100644 (file)
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -762,8 +762,8 @@ 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;
@@ -884,7 +884,7 @@ 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;