[PATCH] ASoC: wm8960: Fix error handling in probe
Commit 422f10adc3eb ("ASoC: wm8960: Add support for the power supplies") added regulator support to the wm8960 driver, but neglected to update error handling in the probe function. This results in warning backtraces if the probe function fails.
WARNING: CPU: 0 PID: 1 at drivers/regulator/core.c:2396 _regulator_put.part.0+0x1b4/0x1d8 Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Tainted: G N 6.5.0-11075-g92901222f83d #1 Hardware name: Freescale i.MX6 Ultralite (Device Tree) unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x68/0x90 dump_stack_lvl from __warn+0x70/0x1a4 __warn from warn_slowpath_fmt+0xac/0x220 warn_slowpath_fmt from _regulator_put.part.0+0x1b4/0x1d8 _regulator_put.part.0 from regulator_bulk_free+0x44/0x64 regulator_bulk_free from release_nodes+0x50/0x7c release_nodes from devres_release_group+0xbc/0x138 devres_release_group from i2c_device_probe+0x180/0x268 i2c_device_probe from really_probe+0xc4/0x2e0 really_probe from __driver_probe_device+0x84/0x1a0 __driver_probe_device from driver_probe_device+0x2c/0xc4 driver_probe_device from __driver_attach+0x94/0x144 __driver_attach from bus_for_each_dev+0x70/0xc4 bus_for_each_dev from bus_add_driver+0xc4/0x1cc bus_add_driver from driver_register+0x7c/0x114 driver_register from i2c_register_driver+0x3c/0xac i2c_register_driver from do_one_initcall+0x68/0x3b0 do_one_initcall from kernel_init_freeable+0x18c/0x240 kernel_init_freeable from kernel_init+0x14/0x144 kernel_init from ret_from_fork+0x14/0x24
Add the missing calls to regulator_bulk_disable().
Cc: Fabio Estevam festevam@denx.de Cc: Charles Keepax ckeepax@opensource.cirrus.com Fixes: 422f10adc3eb ("ASoC: wm8960: Add support for the power supplies") Signed-off-by: Guenter Roeck linux@roeck-us.net --- sound/soc/codecs/wm8960.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c index 0a50180750e8..7689fe3cc86d 100644 --- a/sound/soc/codecs/wm8960.c +++ b/sound/soc/codecs/wm8960.c @@ -1468,8 +1468,10 @@ static int wm8960_i2c_probe(struct i2c_client *i2c) }
wm8960->regmap = devm_regmap_init_i2c(i2c, &wm8960_regmap); - if (IS_ERR(wm8960->regmap)) - return PTR_ERR(wm8960->regmap); + if (IS_ERR(wm8960->regmap)) { + ret = PTR_ERR(wm8960->regmap); + goto bulk_disable; + }
if (pdata) memcpy(&wm8960->pdata, pdata, sizeof(struct wm8960_data)); @@ -1479,13 +1481,14 @@ static int wm8960_i2c_probe(struct i2c_client *i2c) ret = i2c_master_recv(i2c, &val, sizeof(val)); if (ret >= 0) { dev_err(&i2c->dev, "Not wm8960, wm8960 reg can not read by i2c\n"); - return -EINVAL; + ret = -EINVAL; + goto bulk_disable; }
ret = wm8960_reset(wm8960->regmap); if (ret != 0) { dev_err(&i2c->dev, "Failed to issue reset\n"); - return ret; + goto bulk_disable; }
if (wm8960->pdata.shared_lrclk) { @@ -1494,7 +1497,7 @@ static int wm8960_i2c_probe(struct i2c_client *i2c) if (ret != 0) { dev_err(&i2c->dev, "Failed to enable LRCM: %d\n", ret); - return ret; + goto bulk_disable; } }
@@ -1528,7 +1531,13 @@ static int wm8960_i2c_probe(struct i2c_client *i2c)
ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_wm8960, &wm8960_dai, 1); + if (ret) + goto bulk_disable;
+ return 0; + +bulk_disable: + regulator_bulk_disable(ARRAY_SIZE(wm8960->supplies), wm8960->supplies); return ret; }
On 09/09/2023 09:02, Guenter Roeck wrote:
Commit 422f10adc3eb ("ASoC: wm8960: Add support for the power supplies") added regulator support to the wm8960 driver, but neglected to update error handling in the probe function. This results in warning backtraces if the probe function fails.
WARNING: CPU: 0 PID: 1 at drivers/regulator/core.c:2396 _regulator_put.part.0+0x1b4/0x1d8 Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Tainted: G N 6.5.0-11075-g92901222f83d #1 Hardware name: Freescale i.MX6 Ultralite (Device Tree) unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x68/0x90 dump_stack_lvl from __warn+0x70/0x1a4 __warn from warn_slowpath_fmt+0xac/0x220 warn_slowpath_fmt from _regulator_put.part.0+0x1b4/0x1d8 _regulator_put.part.0 from regulator_bulk_free+0x44/0x64 regulator_bulk_free from release_nodes+0x50/0x7c release_nodes from devres_release_group+0xbc/0x138 devres_release_group from i2c_device_probe+0x180/0x268 i2c_device_probe from really_probe+0xc4/0x2e0 really_probe from __driver_probe_device+0x84/0x1a0 __driver_probe_device from driver_probe_device+0x2c/0xc4 driver_probe_device from __driver_attach+0x94/0x144 __driver_attach from bus_for_each_dev+0x70/0xc4 bus_for_each_dev from bus_add_driver+0xc4/0x1cc bus_add_driver from driver_register+0x7c/0x114 driver_register from i2c_register_driver+0x3c/0xac i2c_register_driver from do_one_initcall+0x68/0x3b0 do_one_initcall from kernel_init_freeable+0x18c/0x240 kernel_init_freeable from kernel_init+0x14/0x144 kernel_init from ret_from_fork+0x14/0x24
Add the missing calls to regulator_bulk_disable().
Cc: Fabio Estevam festevam@denx.de Cc: Charles Keepax ckeepax@opensource.cirrus.com Fixes: 422f10adc3eb ("ASoC: wm8960: Add support for the power supplies") Signed-off-by: Guenter Roeck linux@roeck-us.net
Thanks for the fix:
Reviewed-by: Fabio Estevam festevam@denx.de
On Sat, Sep 09, 2023 at 05:02:37AM -0700, Guenter Roeck wrote:
Commit 422f10adc3eb ("ASoC: wm8960: Add support for the power supplies") added regulator support to the wm8960 driver, but neglected to update error handling in the probe function. This results in warning backtraces if the probe function fails.
WARNING: CPU: 0 PID: 1 at drivers/regulator/core.c:2396 _regulator_put.part.0+0x1b4/0x1d8 Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Tainted: G N 6.5.0-11075-g92901222f83d #1 Hardware name: Freescale i.MX6 Ultralite (Device Tree) unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x68/0x90 dump_stack_lvl from __warn+0x70/0x1a4
Please think hard before including complete backtraces in upstream reports, they are very large and contain almost no useful information relative to their size so often obscure the relevant content in your message. If part of the backtrace is usefully illustrative (it often is for search engines if nothing else) then it's usually better to pull out the relevant sections.
On Sat, 09 Sep 2023 05:02:37 -0700, Guenter Roeck wrote:
Commit 422f10adc3eb ("ASoC: wm8960: Add support for the power supplies") added regulator support to the wm8960 driver, but neglected to update error handling in the probe function. This results in warning backtraces if the probe function fails.
WARNING: CPU: 0 PID: 1 at drivers/regulator/core.c:2396 _regulator_put.part.0+0x1b4/0x1d8 Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Tainted: G N 6.5.0-11075-g92901222f83d #1 Hardware name: Freescale i.MX6 Ultralite (Device Tree) unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x68/0x90 dump_stack_lvl from __warn+0x70/0x1a4 __warn from warn_slowpath_fmt+0xac/0x220 warn_slowpath_fmt from _regulator_put.part.0+0x1b4/0x1d8 _regulator_put.part.0 from regulator_bulk_free+0x44/0x64 regulator_bulk_free from release_nodes+0x50/0x7c release_nodes from devres_release_group+0xbc/0x138 devres_release_group from i2c_device_probe+0x180/0x268 i2c_device_probe from really_probe+0xc4/0x2e0 really_probe from __driver_probe_device+0x84/0x1a0 __driver_probe_device from driver_probe_device+0x2c/0xc4 driver_probe_device from __driver_attach+0x94/0x144 __driver_attach from bus_for_each_dev+0x70/0xc4 bus_for_each_dev from bus_add_driver+0xc4/0x1cc bus_add_driver from driver_register+0x7c/0x114 driver_register from i2c_register_driver+0x3c/0xac i2c_register_driver from do_one_initcall+0x68/0x3b0 do_one_initcall from kernel_init_freeable+0x18c/0x240 kernel_init_freeable from kernel_init+0x14/0x144 kernel_init from ret_from_fork+0x14/0x24
[...]
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
Thanks!
[1/1] ASoC: wm8960: Fix error handling in probe commit: d7e47e32192bb88f5b2dc8e655fa587ecf9d71e0
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
participants (3)
-
Fabio Estevam -
Guenter Roeck -
Mark Brown