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

devm_request_threaded_irq result should be checked for errors.
Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1487764057-23362-1-git-send-email-a.hajda@samsung.com

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

@@ -2184,6 +2184,10 @@ static int sii8620_probe(struct i2c_client *client,
 					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)) {