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Commit 1327a4df authored by Mao Jinlong's avatar Mao Jinlong
Browse files

coresight: hwevent: Add support of empty mux register list 



When there is no mux register which can be written, the mux register
list can be empty.

Change-Id: I7dc88943fc1f18e11de23226ed765f303c5bad97
Signed-off-by: default avatarMao Jinlong <jinlmao@codeaurora.org>
parent 0309d5f4

drivers/hwtracing/coresight/coresight-hwevent.c

+4 −5
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.

 * Copyright (c) 2013-2017, 2019, The Linux Foundation. All rights reserved.

 */



#include <linux/kernel.h>
@@ -170,8 +170,8 @@ static int hwevent_init_hmux(struct hwevent_drvdata *drvdata, 
	drvdata->nr_hmux = of_property_count_strings(node,

						     "reg-names");



	if (!drvdata->nr_hmux)

		return -ENODEV;

	if (drvdata->nr_hmux < 0)

		drvdata->nr_hmux = 0;



	if (drvdata->nr_hmux > 0) {

		drvdata->hmux = devm_kzalloc(drvdata->dev, drvdata->nr_hmux *
@@ -191,9 +191,8 @@ static int hwevent_init_hmux(struct hwevent_drvdata *drvdata, 
				return -ENODEV;

			drvdata->hmux[i].start = res->start;

			drvdata->hmux[i].end = res->end;



		}

	} else {

		return drvdata->nr_hmux;

	}



	return 0;