[PATCH 4.9 124/206] ASoC: cht_bsw_rt5645: Fix leftover kmalloc

From: Greg Kroah-Hartman
Date: Tue Jan 10 2017 - 08:49:17 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@xxxxxxx>

commit a823a17981a73faa115bc0f7eda0190763075e2c upstream.

cht_bsw_rt5645 driver allocates the own codec_id string but doesn't
release it. For simplicity, put the string in cht_mc_private; then
the string is allocated in a shot and released altogether.

Fixes: c8560b7c917f ("ASoC: cht_bsw_rt5645: Fix writing to string literal")
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
sound/soc/intel/boards/cht_bsw_rt5645.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/sound/soc/intel/boards/cht_bsw_rt5645.c
+++ b/sound/soc/intel/boards/cht_bsw_rt5645.c
@@ -44,6 +44,7 @@ struct cht_acpi_card {
struct cht_mc_private {
struct snd_soc_jack jack;
struct cht_acpi_card *acpi_card;
+ char codec_name[16];
};

static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
@@ -354,7 +355,6 @@ static int snd_cht_mc_probe(struct platf
int i;
struct cht_mc_private *drv;
struct snd_soc_card *card = snd_soc_cards[0].soc_card;
- char codec_name[16];
struct sst_acpi_mach *mach;
const char *i2c_name = NULL;
int dai_index = 0;
@@ -374,12 +374,12 @@ static int snd_cht_mc_probe(struct platf
}
card->dev = &pdev->dev;
mach = card->dev->platform_data;
- sprintf(codec_name, "i2c-%s:00", drv->acpi_card->codec_id);
+ sprintf(drv->codec_name, "i2c-%s:00", drv->acpi_card->codec_id);

/* set correct codec name */
for (i = 0; i < ARRAY_SIZE(cht_dailink); i++)
if (!strcmp(card->dai_link[i].codec_name, "i2c-10EC5645:00")) {
- card->dai_link[i].codec_name = kstrdup(codec_name, GFP_KERNEL);
+ card->dai_link[i].codec_name = drv->codec_name;
dai_index = i;
}