diff options
| author | Vincent Abriou <vincent.abriou@st.com> | 2017-02-08 10:47:01 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-02-08 18:33:16 +0000 |
| commit | 8480ac567959eecdc694cf4f9c02d6fa687384b6 (patch) | |
| tree | 03f55796b287f9fb4a18358768082859d5675a08 /sound/soc | |
| parent | cd6111b26280a2f38a9fb8e6630c63a96477e4bf (diff) | |
| download | linux-8480ac567959eecdc694cf4f9c02d6fa687384b6.tar.gz linux-8480ac567959eecdc694cf4f9c02d6fa687384b6.tar.bz2 linux-8480ac567959eecdc694cf4f9c02d6fa687384b6.zip | |
ASoC: hdmi-codec: remove HDMI device unregister
While unregistering the hdmi-codec, the hdmi device list must be
cleaned up. It avoid kernel page fault when registering again the
hdmi-codec.
Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/codecs/hdmi-codec.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c index dc6715a804a1..8c5ae1fc23a9 100644 --- a/sound/soc/codecs/hdmi-codec.c +++ b/sound/soc/codecs/hdmi-codec.c @@ -32,6 +32,7 @@ struct hdmi_device { }; #define pos_to_hdmi_device(pos) container_of((pos), struct hdmi_device, list) LIST_HEAD(hdmi_device_list); +static DEFINE_MUTEX(hdmi_mutex); #define DAI_NAME_SIZE 16 @@ -794,6 +795,7 @@ static int hdmi_codec_probe(struct platform_device *pdev) return -ENOMEM; hd = NULL; + mutex_lock(&hdmi_mutex); list_for_each(pos, &hdmi_device_list) { struct hdmi_device *tmp = pos_to_hdmi_device(pos); @@ -805,13 +807,16 @@ static int hdmi_codec_probe(struct platform_device *pdev) if (!hd) { hd = devm_kzalloc(dev, sizeof(*hd), GFP_KERNEL); - if (!hd) + if (!hd) { + mutex_unlock(&hdmi_mutex); return -ENOMEM; + } hd->dev = dev->parent; list_add_tail(&hd->list, &hdmi_device_list); } + mutex_unlock(&hdmi_mutex); if (hd->cnt >= ARRAY_SIZE(hdmi_dai_name)) { dev_err(dev, "too many hdmi codec are deteced\n"); @@ -853,11 +858,25 @@ static int hdmi_codec_probe(struct platform_device *pdev) static int hdmi_codec_remove(struct platform_device *pdev) { + struct device *dev = &pdev->dev; + struct list_head *pos; struct hdmi_codec_priv *hcp; - hcp = dev_get_drvdata(&pdev->dev); + mutex_lock(&hdmi_mutex); + list_for_each(pos, &hdmi_device_list) { + struct hdmi_device *tmp = pos_to_hdmi_device(pos); + + if (tmp->dev == dev->parent) { + list_del(pos); + break; + } + } + mutex_unlock(&hdmi_mutex); + + hcp = dev_get_drvdata(dev); kfree(hcp->chmap_info); - snd_soc_unregister_codec(&pdev->dev); + snd_soc_unregister_codec(dev); + return 0; } |