Merge "ASoC: wcd-mbhc: Fix null pointer dereference for mbhc"

asoc/codecs/wcd-mbhc-v2.c

@@ -1055,6 +1055,10 @@ static irqreturn_t wcd_mbhc_mech_plug_detect_irq(int irq, void *data)
 	struct wcd_mbhc *mbhc = data;
 
 	pr_debug("%s: enter\n", __func__);
+	if (mbhc == NULL) {
+		pr_err("%s: NULL irq data\n", __func__);
+		return IRQ_NONE;
+	}
 	if (unlikely((mbhc->mbhc_cb->lock_sleep(mbhc, true)) == false)) {
 		pr_warn("%s: failed to hold suspend\n", __func__);
 		r = IRQ_NONE;