drm/bridge/sii8620: add missing error handling in probe

devm_request_threaded_irq result should be checked for errors.

Signed-off-by: Andrzej Hajda <[e-mail]>
Signed-off-by: Sean Paul <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/bridge/sil-sii8620.c

···
 					sii8620_irq_thread,
 					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 					"sii8620", ctx);
+	if (ret < 0) {
+		dev_err(dev, "failed to install IRQ handler\n");
+		return ret;
+	}
 
 	ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(ctx->gpio_reset)) {