msm: actuator: Add protection condition for move focus

Neighbour index of step table possibly have same position,
so i2c operation reported invalid size parameters.
we add protection condition to return success value.

Change-Id: I7dab8f44a99c7c3c7d6996c8decb8bcd09c246c9
Signed-off-by: penliu <pengfeiliu@codeaurora.org>

diff --git a/drivers/media/platform/msm/camera_v2/sensor/actuator/msm_actuator.c b/drivers/media/platform/msm/camera_v2/sensor/actuator/msm_actuator.c
index cd48f87..bc844bb 100644 (file)
--- a/drivers/media/platform/msm/camera_v2/sensor/actuator/msm_actuator.c
+++ b/drivers/media/platform/msm/camera_v2/sensor/actuator/msm_actuator.c
@@ -573,7 +573,10 @@ static int32_t msm_actuator_move_focus(
 
        CDBG("called, dir %d, num_steps %d\n", dir, num_steps);
 
-       if (dest_step_pos == a_ctrl->curr_step_pos)
+       if ((dest_step_pos == a_ctrl->curr_step_pos) ||
+               ((dest_step_pos <= a_ctrl->total_steps) &&
+               (a_ctrl->step_position_table[dest_step_pos] ==
+               a_ctrl->step_position_table[a_ctrl->curr_step_pos])))
                return rc;
 
        if ((sign_dir > MSM_ACTUATOR_MOVE_SIGNED_NEAR) ||