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Commit 2fa7962a authored by Mao Jinlong's avatar Mao Jinlong Committed by Gerrit - the friendly Code Review server
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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 a20c9eb7

drivers/hwtracing/coresight/coresight-hwevent.c

+3 −6
Original line number Diff line number Diff line 
/* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.

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

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -200,9 +200,8 @@ static int hwevent_probe(struct platform_device *pdev) 


	drvdata->nr_hmux = of_property_count_strings(pdev->dev.of_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(dev, drvdata->nr_hmux *
@@ -223,8 +222,6 @@ static int hwevent_probe(struct platform_device *pdev) 
			drvdata->hmux[i].start = res->start;

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

		}

	} else {

		return drvdata->nr_hmux;

	}



	mutex_init(&drvdata->mutex);