From 12625e7622f1e2a7e90988377056fe94644ee806 Mon Sep 17 00:00:00 2001
From: Phani Kumar Uppalapati <quic_phaniu@quicinc.com>
Date: Mon, 25 Jul 2022 14:02:11 -0700
Subject: [PATCH] soc: swr-mstr-ctrl: check for device number before port
 params init

If the peripheral device is not enumerated, device number is stuck at
0. Check device number for 0 before initializing port params.

Change-Id: I444b37d56bebdebf75e8e7554cd435beece6b066
---
 soc/swr-mstr-ctrl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/soc/swr-mstr-ctrl.c b/soc/swr-mstr-ctrl.c
index d88dab5132..2738c1752b 100644
--- a/soc/swr-mstr-ctrl.c
+++ b/soc/swr-mstr-ctrl.c
@@ -2494,6 +2494,10 @@ static int swrm_init_port_params(struct swr_master *mstr, u32 dev_num,
 		pr_err("%s: Invalid handle to swr controller\n", __func__);
 		return 0;
 	}
+	if (dev_num == 0) {
+		pr_err("%s: Invalid device number 0\n", __func__);
+		return -EINVAL;
+	}
 	for (i = 0; i < SWR_UC_MAX; i++) {
 		for (j = 0; j < num_ports; j++) {
 			port_id_offset = (dev_num - 1) * SWR_MAX_DEV_PORT_NUM + j;