From: Philipp Puschmann p.puschmann@pironex.de
commit 9df8ba7c63073508e5aa677dade48fcab6a6773e upstream.
If probe fails after enabling the regulators regulator_put is called for each supply without having them disabled before. This produces some warnings like
WARNING: CPU: 0 PID: 90 at drivers/regulator/core.c:2044 _regulator_put.part.0+0x154/0x15c [<c010f7a8>] (unwind_backtrace) from [<c010c544>] (show_stack+0x10/0x14) [<c010c544>] (show_stack) from [<c012b640>] (__warn+0xd0/0xf4) [<c012b640>] (__warn) from [<c012b9b4>] (warn_slowpath_fmt+0x64/0xc4) [<c012b9b4>] (warn_slowpath_fmt) from [<c04c4064>] (_regulator_put.part.0+0x154/0x15c) [<c04c4064>] (_regulator_put.part.0) from [<c04c4094>] (regulator_put+0x28/0x38) [<c04c4094>] (regulator_put) from [<c04c40cc>] (regulator_bulk_free+0x28/0x38) [<c04c40cc>] (regulator_bulk_free) from [<c0579b2c>] (release_nodes+0x1d0/0x22c) [<c0579b2c>] (release_nodes) from [<c05756dc>] (really_probe+0x108/0x34c) [<c05756dc>] (really_probe) from [<c0575aec>] (driver_probe_device+0xb8/0x16c) [<c0575aec>] (driver_probe_device) from [<c0575d40>] (device_driver_attach+0x58/0x60) [<c0575d40>] (device_driver_attach) from [<c0575da0>] (__driver_attach+0x58/0xcc) [<c0575da0>] (__driver_attach) from [<c0573978>] (bus_for_each_dev+0x78/0xc0) [<c0573978>] (bus_for_each_dev) from [<c0574b5c>] (bus_add_driver+0x188/0x1e0) [<c0574b5c>] (bus_add_driver) from [<c05768b0>] (driver_register+0x74/0x108) [<c05768b0>] (driver_register) from [<c061ab7c>] (i2c_register_driver+0x3c/0x88) [<c061ab7c>] (i2c_register_driver) from [<c0102df8>] (do_one_initcall+0x58/0x250) [<c0102df8>] (do_one_initcall) from [<c01a91bc>] (do_init_module+0x60/0x244) [<c01a91bc>] (do_init_module) from [<c01ab5a4>] (load_module+0x2180/0x2540) [<c01ab5a4>] (load_module) from [<c01abbd4>] (sys_finit_module+0xd0/0xe8) [<c01abbd4>] (sys_finit_module) from [<c01011e0>] (__sys_trace_return+0x0/0x20)
Fixes: 3fd6e7d9a146 (ASoC: tas571x: New driver for TI TAS571x power amplifiers) Signed-off-by: Philipp Puschmann p.puschmann@pironex.de Link: https://lore.kernel.org/r/20200414112754.3365406-1-p.puschmann@pironex.de Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- sound/soc/codecs/tas571x.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-)
--- a/sound/soc/codecs/tas571x.c +++ b/sound/soc/codecs/tas571x.c @@ -824,8 +824,10 @@ static int tas571x_i2c_probe(struct i2c_
priv->regmap = devm_regmap_init(dev, NULL, client, priv->chip->regmap_config); - if (IS_ERR(priv->regmap)) - return PTR_ERR(priv->regmap); + if (IS_ERR(priv->regmap)) { + ret = PTR_ERR(priv->regmap); + goto disable_regs; + }
priv->pdn_gpio = devm_gpiod_get_optional(dev, "pdn", GPIOD_OUT_LOW); if (IS_ERR(priv->pdn_gpio)) { @@ -849,7 +851,7 @@ static int tas571x_i2c_probe(struct i2c_
ret = regmap_write(priv->regmap, TAS571X_OSC_TRIM_REG, 0); if (ret) - return ret; + goto disable_regs;
usleep_range(50000, 60000);
@@ -865,12 +867,20 @@ static int tas571x_i2c_probe(struct i2c_ */ ret = regmap_update_bits(priv->regmap, TAS571X_MVOL_REG, 1, 0); if (ret) - return ret; + goto disable_regs; }
- return devm_snd_soc_register_component(&client->dev, + ret = devm_snd_soc_register_component(&client->dev, &priv->component_driver, &tas571x_dai, 1); + if (ret) + goto disable_regs; + + return ret; + +disable_regs: + regulator_bulk_disable(priv->chip->num_supply_names, priv->supplies); + return ret; }
static int tas571x_i2c_remove(struct i2c_client *client)