[PATCH] i2c: i801: fix hardware state machine corruption in error path

[PATCH] i2c: i801: fix hardware state machine corruption in error path

[w15303746062]

From: Mingyu Wang <25181214217@stu.xidian.edu.cn>

A severe livelock and subsequent Hung Task panic were observed in the
i2c-i801 driver during concurrent Fuzzing. The crash is caused by an
unconditional hardware register cleanup in the error handling path of
i801_access().

When i801_check_pre() fails (e.g., returning -EBUSY because the SMBus
controller is actively used by BIOS/ACPI or another thread), the kernel
does not actually acquire the hardware ownership. However, the code jumps
to the 'out' label and executes:

    iowrite8(SMBHSTSTS_INUSE_STS | STATUS_FLAGS, SMBHSTSTS(priv));

This forcefully clears the INUSE_STS lock and resets the hardware status
flags without owning the controller. Doing so interrupts ongoing BIOS/ACPI
transactions and totally corrupts the SMBus hardware state machine.

Consequently, all subsequent i801_access() calls fail at the pre-check
stage, triggering an endless stream of "SMBus is busy, can't use it!"
error logs. Over a slow serial console, this printk flood monopolizes
the CPU (Console Livelock), starving other processes trying to acquire
the mmap_lock down_read semaphore, ultimately triggering the hung task
watchdog.

Fix this by introducing an 'out_err' label. If i801_check_pre() fails,
we safely bypass the hardware register cleanup and only release the
software locks (pm_runtime and mutex), strictly adhering to the rule of
not releasing resources that were never acquired.

Signed-off-by: Mingyu Wang <25181214217@stu.xidian.edu.cn>
---
 drivers/i2c/busses/i2c-i801.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 32a3cef02c7b..068b9ffb234f 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -905,7 +905,7 @@ static s32 i801_access(struct i2c_adapter *adap, u16 addr,
 
 	ret = i801_check_pre(priv);
 	if (ret)
-		goto out;
+		goto out_err;
 
 	hwpec = (priv->features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC)
 		&& size != I2C_SMBUS_QUICK
@@ -938,6 +938,7 @@ static s32 i801_access(struct i2c_adapter *adap, u16 addr,
 	 */
 	iowrite8(SMBHSTSTS_INUSE_STS | STATUS_FLAGS, SMBHSTSTS(priv));
 
+out_err:
 	pm_runtime_put_autosuspend(&priv->pci_dev->dev);
 	mutex_unlock(&priv->acpi_lock);
 	return ret;
-- 
2.34.1

Re: [PATCH] i2c: i801: fix hardware state machine corruption in error path

[Jean Delvare]

Hi Wang,

On Thu,  7 May 2026 19:43:56 +0800, w15303746062@163.com wrote:
> From: Mingyu Wang <25181214217@stu.xidian.edu.cn>
> 
> A severe livelock and subsequent Hung Task panic were observed in the
> i2c-i801 driver during concurrent Fuzzing. The crash is caused by an
> unconditional hardware register cleanup in the error handling path of
> i801_access().
> 
> When i801_check_pre() fails (e.g., returning -EBUSY because the SMBus
> controller is actively used by BIOS/ACPI or another thread), the kernel

This can't be "another thread", as calls to i801_access() are
serialized.

> does not actually acquire the hardware ownership. However, the code jumps
> to the 'out' label and executes:
> 
>     iowrite8(SMBHSTSTS_INUSE_STS | STATUS_FLAGS, SMBHSTSTS(priv));
> 
> This forcefully clears the INUSE_STS lock and resets the hardware status
> flags without owning the controller. Doing so interrupts ongoing BIOS/ACPI
> transactions and totally corrupts the SMBus hardware state machine.
> 
> Consequently, all subsequent i801_access() calls fail at the pre-check
> stage, triggering an endless stream of "SMBus is busy, can't use it!"
> error logs. Over a slow serial console, this printk flood monopolizes
> the CPU (Console Livelock), starving other processes trying to acquire
> the mmap_lock down_read semaphore, ultimately triggering the hung task
> watchdog.

Analysis looks good. We indeed should not write to a register if we do
not own the device.

> Fix this by introducing an 'out_err' label. If i801_check_pre() fails,
> we safely bypass the hardware register cleanup and only release the
> software locks (pm_runtime and mutex), strictly adhering to the rule of
> not releasing resources that were never acquired.

This fix introduces a build-time warning:

drivers/i2c/busses/i2c-i801.c: In function ‘i801_access’:
drivers/i2c/busses/i2c-i801.c:930:1: warning: label ‘out’ defined but not used [-Wunused-label]
  930 | out:
      | ^~~
drivers/i2c/busses/i2c-i801.c:930:1: warning: unused label 'out'

Am I missing another driver change? Or did you not test-build your
patch?

There's only one goto in i801_access(), so you don't need 2 labels.
Instead of introducing a new label you should move the existing one.

> Signed-off-by: Mingyu Wang <25181214217@stu.xidian.edu.cn>

I looked into the driver history to try and figure out when the bug was
introduced.

The label you are moving was re-introduced when the call to
i801_check_pre() was moved to i801_access() in v6.3 by:

commit 1f760b87e54cf56a25ab68f8dc625e339f6e46d5
Author: Heiner Kallweit
Date:   Thu Feb 16 17:14:51 2023 +0100

    i2c: i801: Call i801_check_pre() from i801_access()

However it existed already in earlier driver versions, until
a3989dc0b059 ("i2c: i801: Centralize configuring block commands in
i801_block_transaction") also in v6.3. As i801_check_pre() was called
later back then, we already wrote to device registers many times before
the check, so fixing this bug in older versions of the driver would be
much harder.

So I think your fix should be backported to stable branches v6.3+, and
if anyone wants the fix in an older kernel, they will have to backport
1f760b87e54c ("i2c: i801: Call i801_check_pre() from i801_access()")
first.

The first relevant commit in the driver history seems to be:

ommit 065b6211a87746e196b56759a70c7851418dd741
Author: Heiner Kallweit
Date:   Sun Jun 6 15:55:55 2021 +0200

    i2c: i801: Ensure that SMBHSTSTS_INUSE_STS is cleared when leaving i801_access

Before that, we did not touch SMBHSTSTS at the end of i801_access(), so
the fix does not apply (although the bug was present in another form, as
we were writing to device registers before the busy check back then).

The status flag clearing was added by:

commit 4f7275fc7e570dfc46f733ff8ae131cb128a4758
Author: Heiner Kallweit
Date:   Sat Dec 4 21:04:40 2021 +0100

    i2c: i801: Don't clear status flags twice in interrupt mode

but then again it's only moving the execution around, not introducing
the bug.

Anyway, this was for information only, I do not think the issue is
worth fixing in older kernels where the driver code is very different.
Concurrent access to the SMBus controller by the native Linux driver
and the firmware was best effort originally and we are well aware that
it was not 100% reliable back then. Anyone who cares about this
scenario would have to use a newer version of the i2c-i801 driver.

> ---
>  drivers/i2c/busses/i2c-i801.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
> index 32a3cef02c7b..068b9ffb234f 100644
> --- a/drivers/i2c/busses/i2c-i801.c
> +++ b/drivers/i2c/busses/i2c-i801.c
> @@ -905,7 +905,7 @@ static s32 i801_access(struct i2c_adapter *adap, u16 addr,
>  
>  	ret = i801_check_pre(priv);
>  	if (ret)
> -		goto out;
> +		goto out_err;
>  
>  	hwpec = (priv->features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC)
>  		&& size != I2C_SMBUS_QUICK
> @@ -938,6 +938,7 @@ static s32 i801_access(struct i2c_adapter *adap, u16 addr,
>  	 */
>  	iowrite8(SMBHSTSTS_INUSE_STS | STATUS_FLAGS, SMBHSTSTS(priv));
>  
> +out_err:
>  	pm_runtime_put_autosuspend(&priv->pci_dev->dev);
>  	mutex_unlock(&priv->acpi_lock);
>  	return ret;


-- 
Jean Delvare
SUSE L3 Support

Re: [PATCH] i2c: i801: fix hardware state machine corruption in error path

[kernel test robot]

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on andi-shyti/i2c/i2c-host]
[also build test WARNING on linus/master v7.1-rc3 next-20260508]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/w15303746062-163-com/i2c-i801-fix-hardware-state-machine-corruption-in-error-path/20260514-165009
base:   https://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux.git i2c/i2c-host
patch link:    https://lore.kernel.org/r/20260507114356.247525-1-w15303746062%40163.com
patch subject: [PATCH] i2c: i801: fix hardware state machine corruption in error path
config: powerpc-randconfig-001-20260514 (https://download.01.org/0day-ci/archive/20260515/202605150012.iDZZ7jFf-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260515/202605150012.iDZZ7jFf-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605150012.iDZZ7jFf-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/i2c/busses/i2c-i801.c: In function 'i801_access':
>> drivers/i2c/busses/i2c-i801.c:934:1: warning: label 'out' defined but not used [-Wunused-label]
    out:
    ^~~


vim +/out +934 drivers/i2c/busses/i2c-i801.c

^1da177e4c3f415 Linus Torvalds    2005-04-16  889  
97140342e69d479 David Brownell    2008-07-14  890  /* Return negative errno on error. */
^1da177e4c3f415 Linus Torvalds    2005-04-16  891  static s32 i801_access(struct i2c_adapter *adap, u16 addr,
^1da177e4c3f415 Linus Torvalds    2005-04-16  892  		       unsigned short flags, char read_write, u8 command,
^1da177e4c3f415 Linus Torvalds    2005-04-16  893  		       int size, union i2c_smbus_data *data)
^1da177e4c3f415 Linus Torvalds    2005-04-16  894  {
a3989dc0b059a51 Heiner Kallweit   2023-02-16  895  	int hwpec, ret;
0cd96eb0a74791c David Woodhouse   2010-10-31  896  	struct i801_priv *priv = i2c_get_adapdata(adap);
^1da177e4c3f415 Linus Torvalds    2005-04-16  897  
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  898  	mutex_lock(&priv->acpi_lock);
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  899  	if (priv->acpi_reserved) {
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  900  		mutex_unlock(&priv->acpi_lock);
a7ae81952cdab56 Mika Westerberg   2016-06-09  901  		return -EBUSY;
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  902  	}
a7ae81952cdab56 Mika Westerberg   2016-06-09  903  
a7401ca5596e246 Jarkko Nikula     2016-03-10  904  	pm_runtime_get_sync(&priv->pci_dev->dev);
a7401ca5596e246 Jarkko Nikula     2016-03-10  905  
1f760b87e54cf56 Heiner Kallweit   2023-02-16  906  	ret = i801_check_pre(priv);
1f760b87e54cf56 Heiner Kallweit   2023-02-16  907  	if (ret)
e67d702846114f6 Mingyu Wang       2026-05-07  908  		goto out_err;
1f760b87e54cf56 Heiner Kallweit   2023-02-16  909  
0cd96eb0a74791c David Woodhouse   2010-10-31  910  	hwpec = (priv->features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC)
e8aac4a9b417643 Jean Delvare      2005-10-26  911  		&& size != I2C_SMBUS_QUICK
e8aac4a9b417643 Jean Delvare      2005-10-26  912  		&& size != I2C_SMBUS_I2C_BLOCK_DATA;
^1da177e4c3f415 Linus Torvalds    2005-04-16  913  
ca8b9e32a11a7cb Oleg Ryjkov       2007-07-12  914  	if (hwpec)	/* enable/disable hardware PEC */
4a3f77ea77013d8 Heiner Kallweit   2025-03-12  915  		iowrite8(ioread8(SMBAUXCTL(priv)) | SMBAUXCTL_CRC, SMBAUXCTL(priv));
ca8b9e32a11a7cb Oleg Ryjkov       2007-07-12  916  	else
4a3f77ea77013d8 Heiner Kallweit   2025-03-12  917  		iowrite8(ioread8(SMBAUXCTL(priv)) & (~SMBAUXCTL_CRC),
0cd96eb0a74791c David Woodhouse   2010-10-31  918  		       SMBAUXCTL(priv));
e8aac4a9b417643 Jean Delvare      2005-10-26  919  
6ff9d46cd36fbd0 Heiner Kallweit   2024-02-02  920  	if (size == I2C_SMBUS_BLOCK_DATA || size == I2C_SMBUS_BLOCK_PROC_CALL)
6ff9d46cd36fbd0 Heiner Kallweit   2024-02-02  921  		ret = i801_smbus_block_transaction(priv, data, addr, command, read_write, size);
6ff9d46cd36fbd0 Heiner Kallweit   2024-02-02  922  	else if (size == I2C_SMBUS_I2C_BLOCK_DATA)
6ff9d46cd36fbd0 Heiner Kallweit   2024-02-02  923  		ret = i801_i2c_block_transaction(priv, data, addr, command, read_write, size);
7edcb9abb594a8f Oleg Ryjkov       2007-07-12  924  	else
24592482d235107 Heiner Kallweit   2023-02-16  925  		ret = i801_simple_transaction(priv, data, addr, command, read_write, size);
^1da177e4c3f415 Linus Torvalds    2005-04-16  926  
de461a2607c69c4 Heiner Kallweit   2023-02-16  927  	ret = i801_check_post(priv, ret);
de461a2607c69c4 Heiner Kallweit   2023-02-16  928  
c79cfbaccac0ef8 Jean Delvare      2006-04-20  929  	/* Some BIOSes don't like it when PEC is enabled at reboot or resume
63fd342fd121c3e Heiner Kallweit   2023-02-16  930  	 * time, so we forcibly disable it after every transaction.
63fd342fd121c3e Heiner Kallweit   2023-02-16  931  	 */
63fd342fd121c3e Heiner Kallweit   2023-02-16  932  	if (hwpec)
4a3f77ea77013d8 Heiner Kallweit   2025-03-12  933  		iowrite8(ioread8(SMBAUXCTL(priv)) & ~SMBAUXCTL_CRC, SMBAUXCTL(priv));
1f760b87e54cf56 Heiner Kallweit   2023-02-16 @934  out:
4f7275fc7e570df Heiner Kallweit   2021-12-04  935  	/*
4f7275fc7e570df Heiner Kallweit   2021-12-04  936  	 * Unlock the SMBus device for use by BIOS/ACPI,
4f7275fc7e570df Heiner Kallweit   2021-12-04  937  	 * and clear status flags if not done already.
4f7275fc7e570df Heiner Kallweit   2021-12-04  938  	 */
4a3f77ea77013d8 Heiner Kallweit   2025-03-12  939  	iowrite8(SMBHSTSTS_INUSE_STS | STATUS_FLAGS, SMBHSTSTS(priv));
065b6211a87746e Heiner Kallweit   2021-06-06  940  
e67d702846114f6 Mingyu Wang       2026-05-07  941  out_err:
a7401ca5596e246 Jarkko Nikula     2016-03-10  942  	pm_runtime_put_autosuspend(&priv->pci_dev->dev);
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  943  	mutex_unlock(&priv->acpi_lock);
a7401ca5596e246 Jarkko Nikula     2016-03-10  944  	return ret;
^1da177e4c3f415 Linus Torvalds    2005-04-16  945  }
^1da177e4c3f415 Linus Torvalds    2005-04-16  946  

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH] i2c: i801: fix hardware state machine corruption in error path

[kernel test robot]

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on andi-shyti/i2c/i2c-host]
[also build test WARNING on linus/master v7.1-rc3 next-20260508]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/w15303746062-163-com/i2c-i801-fix-hardware-state-machine-corruption-in-error-path/20260514-165009
base:   https://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux.git i2c/i2c-host
patch link:    https://lore.kernel.org/r/20260507114356.247525-1-w15303746062%40163.com
patch subject: [PATCH] i2c: i801: fix hardware state machine corruption in error path
config: loongarch-randconfig-002-20260514 (https://download.01.org/0day-ci/archive/20260515/202605150921.HPErQGU3-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260515/202605150921.HPErQGU3-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605150921.HPErQGU3-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/i2c/busses/i2c-i801.c:934:1: warning: unused label 'out' [-Wunused-label]
     934 | out:
         | ^~~~
   1 warning generated.


vim +/out +934 drivers/i2c/busses/i2c-i801.c

^1da177e4c3f415 Linus Torvalds    2005-04-16  889  
97140342e69d479 David Brownell    2008-07-14  890  /* Return negative errno on error. */
^1da177e4c3f415 Linus Torvalds    2005-04-16  891  static s32 i801_access(struct i2c_adapter *adap, u16 addr,
^1da177e4c3f415 Linus Torvalds    2005-04-16  892  		       unsigned short flags, char read_write, u8 command,
^1da177e4c3f415 Linus Torvalds    2005-04-16  893  		       int size, union i2c_smbus_data *data)
^1da177e4c3f415 Linus Torvalds    2005-04-16  894  {
a3989dc0b059a51 Heiner Kallweit   2023-02-16  895  	int hwpec, ret;
0cd96eb0a74791c David Woodhouse   2010-10-31  896  	struct i801_priv *priv = i2c_get_adapdata(adap);
^1da177e4c3f415 Linus Torvalds    2005-04-16  897  
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  898  	mutex_lock(&priv->acpi_lock);
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  899  	if (priv->acpi_reserved) {
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  900  		mutex_unlock(&priv->acpi_lock);
a7ae81952cdab56 Mika Westerberg   2016-06-09  901  		return -EBUSY;
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  902  	}
a7ae81952cdab56 Mika Westerberg   2016-06-09  903  
a7401ca5596e246 Jarkko Nikula     2016-03-10  904  	pm_runtime_get_sync(&priv->pci_dev->dev);
a7401ca5596e246 Jarkko Nikula     2016-03-10  905  
1f760b87e54cf56 Heiner Kallweit   2023-02-16  906  	ret = i801_check_pre(priv);
1f760b87e54cf56 Heiner Kallweit   2023-02-16  907  	if (ret)
e67d702846114f6 Mingyu Wang       2026-05-07  908  		goto out_err;
1f760b87e54cf56 Heiner Kallweit   2023-02-16  909  
0cd96eb0a74791c David Woodhouse   2010-10-31  910  	hwpec = (priv->features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC)
e8aac4a9b417643 Jean Delvare      2005-10-26  911  		&& size != I2C_SMBUS_QUICK
e8aac4a9b417643 Jean Delvare      2005-10-26  912  		&& size != I2C_SMBUS_I2C_BLOCK_DATA;
^1da177e4c3f415 Linus Torvalds    2005-04-16  913  
ca8b9e32a11a7cb Oleg Ryjkov       2007-07-12  914  	if (hwpec)	/* enable/disable hardware PEC */
4a3f77ea77013d8 Heiner Kallweit   2025-03-12  915  		iowrite8(ioread8(SMBAUXCTL(priv)) | SMBAUXCTL_CRC, SMBAUXCTL(priv));
ca8b9e32a11a7cb Oleg Ryjkov       2007-07-12  916  	else
4a3f77ea77013d8 Heiner Kallweit   2025-03-12  917  		iowrite8(ioread8(SMBAUXCTL(priv)) & (~SMBAUXCTL_CRC),
0cd96eb0a74791c David Woodhouse   2010-10-31  918  		       SMBAUXCTL(priv));
e8aac4a9b417643 Jean Delvare      2005-10-26  919  
6ff9d46cd36fbd0 Heiner Kallweit   2024-02-02  920  	if (size == I2C_SMBUS_BLOCK_DATA || size == I2C_SMBUS_BLOCK_PROC_CALL)
6ff9d46cd36fbd0 Heiner Kallweit   2024-02-02  921  		ret = i801_smbus_block_transaction(priv, data, addr, command, read_write, size);
6ff9d46cd36fbd0 Heiner Kallweit   2024-02-02  922  	else if (size == I2C_SMBUS_I2C_BLOCK_DATA)
6ff9d46cd36fbd0 Heiner Kallweit   2024-02-02  923  		ret = i801_i2c_block_transaction(priv, data, addr, command, read_write, size);
7edcb9abb594a8f Oleg Ryjkov       2007-07-12  924  	else
24592482d235107 Heiner Kallweit   2023-02-16  925  		ret = i801_simple_transaction(priv, data, addr, command, read_write, size);
^1da177e4c3f415 Linus Torvalds    2005-04-16  926  
de461a2607c69c4 Heiner Kallweit   2023-02-16  927  	ret = i801_check_post(priv, ret);
de461a2607c69c4 Heiner Kallweit   2023-02-16  928  
c79cfbaccac0ef8 Jean Delvare      2006-04-20  929  	/* Some BIOSes don't like it when PEC is enabled at reboot or resume
63fd342fd121c3e Heiner Kallweit   2023-02-16  930  	 * time, so we forcibly disable it after every transaction.
63fd342fd121c3e Heiner Kallweit   2023-02-16  931  	 */
63fd342fd121c3e Heiner Kallweit   2023-02-16  932  	if (hwpec)
4a3f77ea77013d8 Heiner Kallweit   2025-03-12  933  		iowrite8(ioread8(SMBAUXCTL(priv)) & ~SMBAUXCTL_CRC, SMBAUXCTL(priv));
1f760b87e54cf56 Heiner Kallweit   2023-02-16 @934  out:
4f7275fc7e570df Heiner Kallweit   2021-12-04  935  	/*
4f7275fc7e570df Heiner Kallweit   2021-12-04  936  	 * Unlock the SMBus device for use by BIOS/ACPI,
4f7275fc7e570df Heiner Kallweit   2021-12-04  937  	 * and clear status flags if not done already.
4f7275fc7e570df Heiner Kallweit   2021-12-04  938  	 */
4a3f77ea77013d8 Heiner Kallweit   2025-03-12  939  	iowrite8(SMBHSTSTS_INUSE_STS | STATUS_FLAGS, SMBHSTSTS(priv));
065b6211a87746e Heiner Kallweit   2021-06-06  940  
e67d702846114f6 Mingyu Wang       2026-05-07  941  out_err:
a7401ca5596e246 Jarkko Nikula     2016-03-10  942  	pm_runtime_put_autosuspend(&priv->pci_dev->dev);
cfc69c2e6c699c9 Charles Haithcock 2026-02-27  943  	mutex_unlock(&priv->acpi_lock);
a7401ca5596e246 Jarkko Nikula     2016-03-10  944  	return ret;
^1da177e4c3f415 Linus Torvalds    2005-04-16  945  }
^1da177e4c3f415 Linus Torvalds    2005-04-16  946  

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki