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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>
This commit is contained in:
Vincent Abriou 2017-02-08 10:47:01 +01:00 committed by Mark Brown
parent cd6111b262
commit 8480ac5679
1 changed files with 22 additions and 3 deletions
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25
sound/soc/codecs/hdmi-codec.c
View File

@ -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;
}