soc: swr-mstr: Add out-of-bound check

Update out-of-bound check in parse swr port mapping.

Change-Id: I3735ff68c293fdb96dd7b004438faa999195adb2
Signed-off-by: Laxminath Kasam <[email protected]>

soc/swr-mstr-ctrl.c

@@ -2792,6 +2792,13 @@ static int swrm_probe(struct platform_device *pdev)
 
 		if (port_num != old_port_num)
 			ch_iter = 0;
+		if (port_num > SWR_MSTR_PORT_LEN ||
+			ch_iter >= SWR_MAX_CH_PER_PORT) {
+			dev_err(&pdev->dev,
+				"%s:invalid port_num %d or ch_iter %d\n",
+				__func__, port_num, ch_iter);
+			goto err_pdata_fail;
+		}
 		swrm->port_mapping[port_num][ch_iter].port_type = port_type;
 		swrm->port_mapping[port_num][ch_iter++].ch_mask = ch_mask;
 		old_port_num = port_num;

soc/swr-mstr-ctrl.h

@@ -171,7 +171,7 @@ struct swr_mstr_ctrl {
 	struct work_struct dc_presence_work;
 	u8 num_ports;
 	struct swrm_port_type
-			port_mapping[SWR_MSTR_PORT_LEN][SWR_MAX_CH_PER_PORT];
+			port_mapping[SWR_MSTR_PORT_LEN + 1][SWR_MAX_CH_PER_PORT];
 	int swr_irq;
 	u32 clk_stop_mode0_supp;
 	struct work_struct wakeup_work;