linux-kernel - [PATCH 07/11] ASoC: amd: memory freeing for rtd structure

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Message-ID: <1524741374-13523-7-git-send-email-Vijendar.Mukunda@amd.com>
Date:   Thu, 26 Apr 2018 16:45:53 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     unlisted-recipients:; (no To-header on input)
CC:     Vijendar Mukunda <Vijendar.Mukunda@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Alex Deucher <alexander.deucher@....com>,
        Akshu Agrawal <akshu.agrawal@....com>,
        "Jason Clinton" <jclinton@...omium.org>,
        Guenter Roeck <linux@...ck-us.net>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 07/11] ASoC: amd: memory freeing for rtd structure

rtd structure freed early may result in kernel panic in dma close
call back. moved releasing memory for rtd structure to the end of
dma close callback.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/acp-pcm-dma.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index b7bffc7..aa2fb38 100644
--- a/sound/soc/amd/acp-pcm-dma.c
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -990,8 +990,6 @@ static int acp_dma_close(struct snd_pcm_substream *substream)
 								    DRV_NAME);
 	struct audio_drv_data *adata = dev_get_drvdata(component->dev);
 
-	kfree(rtd);
-
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		adata->play_i2ssp_stream = NULL;
 		/*
@@ -1020,7 +1018,7 @@ static int acp_dma_close(struct snd_pcm_substream *substream)
 	 */
 	if (!adata->play_i2ssp_stream && !adata->capture_i2ssp_stream)
 		acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
-
+	kfree(rtd);
 	return 0;
 }
 
-- 
2.7.4