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2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf

 kernel/drivers/gpu/drm/rockchip/rk628/rk628_dsi.c
.. .. @@ -637,6 +637,9 @@
637 637  	u32 val;
638 638  	int ret;
639 639  
640 +	if (!vrefresh)
641 +		return -EINVAL;
642 +
640 643  	ret = regmap_read_poll_timeout(dsi->regmap,
641 644  				       dsi->reg_base + DSI_CMD_PKT_STATUS,
642 645  				       val, !(val & GEN_RD_CMD_BUSY),

..	..	@@ -637,6 +637,9 @@
637	637	u32 val;
638	638	int ret;
639	639
	640	+ if (!vrefresh)
	641	+ return -EINVAL;
	642	+
640	643	ret = regmap_read_poll_timeout(dsi->regmap,
641	644	dsi->reg_base + DSI_CMD_PKT_STATUS,
642	645	val, !(val & GEN_RD_CMD_BUSY),