linux-kernel - [PATCH 2/3] ASoC: fsl_utils: fix a leaked reference by adding missing of_node

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Message-Id: <1551169071-11639-2-git-send-email-wen.yang99@zte.com.cn>
Date:   Tue, 26 Feb 2019 16:17:50 +0800
From:   Wen Yang <wen.yang99@....com.cn>
To:     lgirdwood@...il.com
Cc:     broonie@...nel.org, perex@...ex.cz, tiwai@...e.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        timur@...nel.org, nicoleotsuka@...il.com, Xiubo.Lee@...il.com,
        festevam@...il.com, linuxppc-dev@...ts.ozlabs.org,
        wang.yi59@....com.cn, Wen Yang <wen.yang99@....com.cn>
Subject: [PATCH 2/3] ASoC: fsl_utils: fix a leaked reference by adding missing of_node_put

The call to of_parse_phandle returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./sound/soc/fsl/fsl_utils.c:74:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 38, but without a corresponding     object release within this function.

Signed-off-by: Wen Yang <wen.yang99@....com.cn>
Cc: Timur Tabi <timur@...nel.org>
Cc: Nicolin Chen <nicoleotsuka@...il.com>
Cc: Xiubo Li <Xiubo.Lee@...il.com>
Cc: Fabio Estevam <festevam@...il.com>
Cc: Liam Girdwood <lgirdwood@...il.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: Takashi Iwai <tiwai@...e.com>
Cc: alsa-devel@...a-project.org
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org
---
 sound/soc/fsl/fsl_utils.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/fsl/fsl_utils.c b/sound/soc/fsl/fsl_utils.c
index 9981668..040d06b 100644
--- a/sound/soc/fsl/fsl_utils.c
+++ b/sound/soc/fsl/fsl_utils.c
@@ -71,6 +71,7 @@ int fsl_asoc_get_dma_channel(struct device_node *ssi_np,
 	iprop = of_get_property(dma_np, "cell-index", NULL);
 	if (!iprop) {
 		of_node_put(dma_np);
+		of_node_put(dma_channel_np);
 		return -EINVAL;
 	}
 	*dma_id = be32_to_cpup(iprop);
-- 
2.9.5