From 85151461f114f2fca386bb8ae6de185461d35d87 Mon Sep 17 00:00:00 2001 From: Michael Trimarchi Date: Thu, 18 Sep 2014 20:38:09 +0200 Subject: [PATCH] ASoC: fsl_ssi: fix kernel panic in probe function code can raise a panic when the ssi_private->pdev is null [...] /* * If codec-handle property is missing from SSI node, we assume * that the machine driver uses new binding which does not require * SSI driver to trigger machine driver's probe. */ if (!of_get_property(np, "codec-handle", NULL)) goto done; [...] ssi_private->pdev = platform_device_register_data(&pdev->dev, name, 0, NULL, 0); [...] done: if (ssi_private->dai_fmt) _fsl_ssi_set_dai_fmt(ssi_private, ssi_private->dai_fmt); Proposal was to not use ssi_private->pdev->dev here but adding a new parameter of *dev pointer to this _set_dai_fmt() -- passing pdev->dev in probe() and cpu_dai->dev in fsl_ssi_set_dai_fmt(). Signed-off-by: Michael Trimarchi Reported-by: Jean-Michel Hautbois Acked-by: Nicolin Chen Signed-off-by: Mark Brown --- sound/soc/fsl/fsl_ssi.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 87eb5776a39b..de6ab06f58a5 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -748,8 +748,9 @@ static int fsl_ssi_hw_free(struct snd_pcm_substream *substream, return 0; } -static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private, - unsigned int fmt) +static int _fsl_ssi_set_dai_fmt(struct device *dev, + struct fsl_ssi_private *ssi_private, + unsigned int fmt) { struct regmap *regs = ssi_private->regs; u32 strcr = 0, stcr, srcr, scr, mask; @@ -758,7 +759,7 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private, ssi_private->dai_fmt = fmt; if (fsl_ssi_is_i2s_master(ssi_private) && IS_ERR(ssi_private->baudclk)) { - dev_err(&ssi_private->pdev->dev, "baudclk is missing which is necessary for master mode\n"); + dev_err(dev, "baudclk is missing which is necessary for master mode\n"); return -EINVAL; } @@ -913,7 +914,7 @@ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai); - return _fsl_ssi_set_dai_fmt(ssi_private, fmt); + return _fsl_ssi_set_dai_fmt(cpu_dai->dev, ssi_private, fmt); } /** @@ -1387,7 +1388,8 @@ static int fsl_ssi_probe(struct platform_device *pdev) done: if (ssi_private->dai_fmt) - _fsl_ssi_set_dai_fmt(ssi_private, ssi_private->dai_fmt); + _fsl_ssi_set_dai_fmt(&pdev->dev, ssi_private, + ssi_private->dai_fmt); return 0; -- 2.39.2