[PATCH] drm/dp/mst: zero out i2c read msg before sending

[Dave Airlie]

From: Dave Airlie <airl...@redhat.com>

This avoids some of the fields being random garbage.

found this while debugging some other pain.

Cc: stable at vger.kernel.org
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c 
b/drivers/gpu/drm/drm_dp_mst_topology.c
index ac3c273..2e4f8a3 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2627,6 +2627,7 @@ static int drm_dp_mst_i2c_xfer(struct i2c_adapter 
*adapter, struct i2c_msg *msgs
                goto out;
        }

+       memset(&msg, 0, sizeof(msg));
        msg.req_type = DP_REMOTE_I2C_READ;
        msg.u.i2c_read.num_transactions = num - 1;
        msg.u.i2c_read.port_number = port->port_num;
-- 
2.4.3