drm/panel: sitronix-st7789v: Add check for of_drm_get_panel_orientation

Add check for the return value of of_drm_get_panel_orientation() and
return the error if it fails in order to catch the error.

Fixes: b27c0f6 ("drm/panel: sitronix-st7789v: add panel orientation support")
Signed-off-by: Chen Ni <[email protected]>
Reviewed-by: Michael Riesch <[email protected]>
Acked-by: Jessica Zhang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Neil Armstrong <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: Chen Ni

drivers/gpu/drm/panel/panel-sitronix-st7789v.c

@@ -643,7 +643,9 @@ static int st7789v_probe(struct spi_device *spi)
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to get backlight\n");
 
-	of_drm_get_panel_orientation(spi->dev.of_node, &ctx->orientation);
+	ret = of_drm_get_panel_orientation(spi->dev.of_node, &ctx->orientation);
+	if (ret)
+		return dev_err_probe(&spi->dev, ret, "Failed to get orientation\n");
 
 	drm_panel_add(&ctx->panel);