6.6-stable review patch. If anyone has any objections, please let me know.
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From: Gergo Koteles soyer@irl.hu
commit 34a1066981a967eab619938e7b35a9be6b4c34e1 upstream.
The tascodec_init() of the snd-soc-tas2781-comlib module is called from snd-soc-tas2781-i2c and snd-hda-scodec-tas2781-i2c modules. It calls request_firmware_nowait() with parameter THIS_MODULE and a cont/callback from the latter modules.
The latter modules can be removed while their callbacks are running, resulting in a general protection failure.
Add module parameter to tascodec_init() so request_firmware_nowait() can be called with the module of the callback.
Fixes: ef3bcde75d06 ("ASoC: tas2781: Add tas2781 driver") CC: stable@vger.kernel.org Signed-off-by: Gergo Koteles soyer@irl.hu Link: https://lore.kernel.org/r/118dad922cef50525e5aab09badef2fa0eb796e5.170707660... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/sound/tas2781.h | 1 + sound/pci/hda/tas2781_hda_i2c.c | 2 +- sound/soc/codecs/tas2781-comlib.c | 3 ++- sound/soc/codecs/tas2781-i2c.c | 2 +- 4 files changed, 5 insertions(+), 3 deletions(-)
--- a/include/sound/tas2781.h +++ b/include/sound/tas2781.h @@ -135,6 +135,7 @@ struct tasdevice_priv {
void tas2781_reset(struct tasdevice_priv *tas_dev); int tascodec_init(struct tasdevice_priv *tas_priv, void *codec, + struct module *module, void (*cont)(const struct firmware *fw, void *context)); struct tasdevice_priv *tasdevice_kzalloc(struct i2c_client *i2c); int tasdevice_init(struct tasdevice_priv *tas_priv); --- a/sound/pci/hda/tas2781_hda_i2c.c +++ b/sound/pci/hda/tas2781_hda_i2c.c @@ -627,7 +627,7 @@ static int tas2781_hda_bind(struct devic
strscpy(comps->name, dev_name(dev), sizeof(comps->name));
- ret = tascodec_init(tas_hda->priv, codec, tasdev_fw_ready); + ret = tascodec_init(tas_hda->priv, codec, THIS_MODULE, tasdev_fw_ready); if (!ret) comps->playback_hook = tas2781_hda_playback_hook;
--- a/sound/soc/codecs/tas2781-comlib.c +++ b/sound/soc/codecs/tas2781-comlib.c @@ -267,6 +267,7 @@ void tas2781_reset(struct tasdevice_priv EXPORT_SYMBOL_GPL(tas2781_reset);
int tascodec_init(struct tasdevice_priv *tas_priv, void *codec, + struct module *module, void (*cont)(const struct firmware *fw, void *context)) { int ret = 0; @@ -280,7 +281,7 @@ int tascodec_init(struct tasdevice_priv tas_priv->dev_name, tas_priv->ndev); crc8_populate_msb(tas_priv->crc8_lkp_tbl, TASDEVICE_CRC8_POLYNOMIAL); tas_priv->codec = codec; - ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT, + ret = request_firmware_nowait(module, FW_ACTION_UEVENT, tas_priv->rca_binaryname, tas_priv->dev, GFP_KERNEL, tas_priv, cont); if (ret) --- a/sound/soc/codecs/tas2781-i2c.c +++ b/sound/soc/codecs/tas2781-i2c.c @@ -564,7 +564,7 @@ static int tasdevice_codec_probe(struct { struct tasdevice_priv *tas_priv = snd_soc_component_get_drvdata(codec);
- return tascodec_init(tas_priv, codec, tasdevice_fw_ready); + return tascodec_init(tas_priv, codec, THIS_MODULE, tasdevice_fw_ready); }
static void tasdevice_deinit(void *context)