Merge "msm: mdss: Account for null ctl passed to line count"

static inline u32 mdss_mdp_video_line_count(struct mdss_mdp_ctl *ctl)

{

	struct mdss_mdp_video_ctx *ctx = ctl->priv_data;

	struct mdss_mdp_video_ctx *ctx;

	u32 line_cnt = 0;

	if (!ctl || !ctl->priv_data)

		goto line_count_exit;

	ctx = ctl->priv_data;

	mdss_mdp_clk_ctrl(MDP_BLOCK_POWER_ON, false);

	line_cnt = mdp_video_read(ctx, MDSS_MDP_REG_INTF_LINE_COUNT);

	mdss_mdp_clk_ctrl(MDP_BLOCK_POWER_OFF, false);

line_count_exit:

	return line_cnt;

}