[PATCH v2] tpm: Fix the driver cleanup code

[PATCH v2] tpm: Fix the driver cleanup code

[Azhar Shaikh]

Commit 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout
the duration of transmit_cmd()") added code which accessed
chip->ops, even after it was set to NULL in tpm_del_char_device(),
called from tpm_chip_unregister() in error / driver exit paths.
So fix this code.

Fixes: 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout
the duration of transmit_cmd()")

Suggested-by: Javier Martinez Canillas <javierm@redhat.com>
Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com>
---
Changes in v2:
- Remove TPM_CHIP_FLAG_DO_NOT_CLEAR_OPS flag, instead call
  tpm_tis_clkrun_enable() directly in tpm_tis_remove()
- Add comment to tpm_tis_clkrun_enable()

 drivers/char/tpm/tpm_tis.c      |  6 ------
 drivers/char/tpm/tpm_tis_core.c | 29 +++++++++++++++++------------
 2 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index d29add49b033..c847fc69a2fc 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -275,9 +275,6 @@ static void tpm_tis_pnp_remove(struct pnp_dev *dev)
 
 	tpm_chip_unregister(chip);
 	tpm_tis_remove(chip);
-	if (is_bsw())
-		iounmap(priv->ilb_base_addr);
-
 }
 
 static struct pnp_driver tis_pnp_driver = {
@@ -329,9 +326,6 @@ static int tpm_tis_plat_remove(struct platform_device *pdev)
 	tpm_chip_unregister(chip);
 	tpm_tis_remove(chip);
 
-	if (is_bsw())
-		iounmap(priv->ilb_base_addr);
-
 	return 0;
 }
 
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index c2227983ed88..519e4a78c8f8 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -37,6 +37,8 @@
  */
 #define TPM_POLL_SLEEP	1  /* msec */
 
+static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value);
+
 static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
 					bool check_cancel, bool *canceled)
 {
@@ -716,8 +718,7 @@ void tpm_tis_remove(struct tpm_chip *chip)
 	u32 interrupt;
 	int rc;
 
-	if (chip->ops->clk_enable != NULL)
-		chip->ops->clk_enable(chip, true);
+	tpm_tis_clkrun_enable(chip, true);
 
 	rc = tpm_tis_read32(priv, reg, &interrupt);
 	if (rc < 0)
@@ -725,8 +726,10 @@ void tpm_tis_remove(struct tpm_chip *chip)
 
 	tpm_tis_write32(priv, reg, ~TPM_GLOBAL_INT_ENABLE & interrupt);
 
-	if (chip->ops->clk_enable != NULL)
-		chip->ops->clk_enable(chip, false);
+	tpm_tis_clkrun_enable(chip, false);
+
+	if (priv->ilb_base_addr)
+		iounmap(priv->ilb_base_addr);
 }
 EXPORT_SYMBOL_GPL(tpm_tis_remove);
 
@@ -736,6 +739,9 @@ void tpm_tis_remove(struct tpm_chip *chip)
  * @chip:	TPM chip to use
  * @value:	1 - Disable CLKRUN protocol, so that clocks are free running
  *		0 - Enable CLKRUN protocol
+ *
+ * Call this function directly in tpm_tis_remove() in error or driver removal
+ * path, since the chip->ops is set to NULL in tpm_chip_unregister().
  */
 static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
 {
@@ -922,21 +928,20 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
 	}
 
 	rc = tpm_chip_register(chip);
-	if (rc && is_bsw())
-		iounmap(priv->ilb_base_addr);
+	if (rc)
+		goto out_err;
 
 	if (chip->ops->clk_enable != NULL)
 		chip->ops->clk_enable(chip, false);
 
-	return rc;
-out_err:
-	tpm_tis_remove(chip);
-	if (is_bsw())
-		iounmap(priv->ilb_base_addr);
+	return 0;
 
-	if (chip->ops->clk_enable != NULL)
+out_err:
+	if ((chip->ops != NULL) && (chip->ops->clk_enable != NULL))
 		chip->ops->clk_enable(chip, false);
 
+	tpm_tis_remove(chip);
+
 	return rc;
 }
 EXPORT_SYMBOL_GPL(tpm_tis_core_init);
-- 
1.9.1

Re: [PATCH v2] tpm: Fix the driver cleanup code

[Jason Gunthorpe]

On Thu, Dec 21, 2017 at 03:13:39PM -0800, Azhar Shaikh wrote:
> Commit 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout
> the duration of transmit_cmd()") added code which accessed
> chip->ops, even after it was set to NULL in tpm_del_char_device(),
> called from tpm_chip_unregister() in error / driver exit paths.
> So fix this code.
> 
> Fixes: 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout
> the duration of transmit_cmd()")
> 
> Suggested-by: Javier Martinez Canillas <javierm@redhat.com>
> Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
> Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com>
> Changes in v2:
> - Remove TPM_CHIP_FLAG_DO_NOT_CLEAR_OPS flag, instead call
>   tpm_tis_clkrun_enable() directly in tpm_tis_remove()
> - Add comment to tpm_tis_clkrun_enable()

Looks Ok to me

Reviewed-by: Jason Gunthorpe <jgg@ziepe.ca>

Jason

Re: [PATCH v2] tpm: Fix the driver cleanup code

[Jarkko Sakkinen]

On Thu, Dec 21, 2017 at 03:13:39PM -0800, Azhar Shaikh wrote:
> Commit 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout
> the duration of transmit_cmd()") added code which accessed
> chip->ops, even after it was set to NULL in tpm_del_char_device(),
> called from tpm_chip_unregister() in error / driver exit paths.
> So fix this code.
> 
> Fixes: 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout
> the duration of transmit_cmd()")
> 
> Suggested-by: Javier Martinez Canillas <javierm@redhat.com>
> Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
> Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com>
> ---
> Changes in v2:
> - Remove TPM_CHIP_FLAG_DO_NOT_CLEAR_OPS flag, instead call
>   tpm_tis_clkrun_enable() directly in tpm_tis_remove()
> - Add comment to tpm_tis_clkrun_enable()
> 
>  drivers/char/tpm/tpm_tis.c      |  6 ------
>  drivers/char/tpm/tpm_tis_core.c | 29 +++++++++++++++++------------
>  2 files changed, 17 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index d29add49b033..c847fc69a2fc 100644
> --- a/drivers/char/tpm/tpm_tis.c
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -275,9 +275,6 @@ static void tpm_tis_pnp_remove(struct pnp_dev *dev)
>  
>  	tpm_chip_unregister(chip);
>  	tpm_tis_remove(chip);
> -	if (is_bsw())
> -		iounmap(priv->ilb_base_addr);
> -
>  }
>  
>  static struct pnp_driver tis_pnp_driver = {
> @@ -329,9 +326,6 @@ static int tpm_tis_plat_remove(struct platform_device *pdev)
>  	tpm_chip_unregister(chip);
>  	tpm_tis_remove(chip);
>  
> -	if (is_bsw())
> -		iounmap(priv->ilb_base_addr);
> -
>  	return 0;
>  }
>  
> diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
> index c2227983ed88..519e4a78c8f8 100644
> --- a/drivers/char/tpm/tpm_tis_core.c
> +++ b/drivers/char/tpm/tpm_tis_core.c
> @@ -37,6 +37,8 @@
>   */
>  #define TPM_POLL_SLEEP	1  /* msec */
>  
> +static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value);
> +
>  static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
>  					bool check_cancel, bool *canceled)
>  {
> @@ -716,8 +718,7 @@ void tpm_tis_remove(struct tpm_chip *chip)
>  	u32 interrupt;
>  	int rc;
>  
> -	if (chip->ops->clk_enable != NULL)
> -		chip->ops->clk_enable(chip, true);
> +	tpm_tis_clkrun_enable(chip, true);
>  
>  	rc = tpm_tis_read32(priv, reg, &interrupt);
>  	if (rc < 0)
> @@ -725,8 +726,10 @@ void tpm_tis_remove(struct tpm_chip *chip)
>  
>  	tpm_tis_write32(priv, reg, ~TPM_GLOBAL_INT_ENABLE & interrupt);
>  
> -	if (chip->ops->clk_enable != NULL)
> -		chip->ops->clk_enable(chip, false);
> +	tpm_tis_clkrun_enable(chip, false);
> +
> +	if (priv->ilb_base_addr)
> +		iounmap(priv->ilb_base_addr);
>  }
>  EXPORT_SYMBOL_GPL(tpm_tis_remove);
>  
> @@ -736,6 +739,9 @@ void tpm_tis_remove(struct tpm_chip *chip)
>   * @chip:	TPM chip to use
>   * @value:	1 - Disable CLKRUN protocol, so that clocks are free running
>   *		0 - Enable CLKRUN protocol
> + *
> + * Call this function directly in tpm_tis_remove() in error or driver removal
> + * path, since the chip->ops is set to NULL in tpm_chip_unregister().
>   */
>  static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
>  {
> @@ -922,21 +928,20 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
>  	}
>  
>  	rc = tpm_chip_register(chip);
> -	if (rc && is_bsw())
> -		iounmap(priv->ilb_base_addr);
> +	if (rc)
> +		goto out_err;
>  
>  	if (chip->ops->clk_enable != NULL)
>  		chip->ops->clk_enable(chip, false);
>  
> -	return rc;
> -out_err:
> -	tpm_tis_remove(chip);
> -	if (is_bsw())
> -		iounmap(priv->ilb_base_addr);
> +	return 0;
>  
> -	if (chip->ops->clk_enable != NULL)
> +out_err:
> +	if ((chip->ops != NULL) && (chip->ops->clk_enable != NULL))
>  		chip->ops->clk_enable(chip, false);
>  
> +	tpm_tis_remove(chip);
> +
>  	return rc;
>  }
>  EXPORT_SYMBOL_GPL(tpm_tis_core_init);
> -- 
> 1.9.1
> 

Since the original commit is not in the mainline yet, you should rather
send an updated version of that commit.

/Jarkko

RE: [PATCH v2] tpm: Fix the driver cleanup code

[Shaikh, Azhar]

>-----Original Message-----
>From: Jarkko Sakkinen [mailto:jarkko.sakkinen@linux.intel.com]
>Sent: Friday, December 22, 2017 10:42 AM
>To: Shaikh, Azhar <azhar.shaikh@intel.com>
>Cc: jgg@ziepe.ca; javierm@redhat.com; peterhuewe@gmx.de; linux-security-
>module@vger.kernel.org; linux-integrity@vger.kernel.org; linux-
>kernel@vger.kernel.org
>Subject: Re: [PATCH v2] tpm: Fix the driver cleanup code
>
>On Thu, Dec 21, 2017 at 03:13:39PM -0800, Azhar Shaikh wrote:
>> Commit 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout the
>> duration of transmit_cmd()") added code which accessed
>> chip->ops, even after it was set to NULL in tpm_del_char_device(),
>> called from tpm_chip_unregister() in error / driver exit paths.
>> So fix this code.
>>
>> Fixes: 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout the
>> duration of transmit_cmd()")
>>
>> Suggested-by: Javier Martinez Canillas <javierm@redhat.com>
>> Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
>> Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com>
>> ---
>> Changes in v2:
>> - Remove TPM_CHIP_FLAG_DO_NOT_CLEAR_OPS flag, instead call
>>   tpm_tis_clkrun_enable() directly in tpm_tis_remove()
>> - Add comment to tpm_tis_clkrun_enable()
>>
>>  drivers/char/tpm/tpm_tis.c      |  6 ------
>>  drivers/char/tpm/tpm_tis_core.c | 29 +++++++++++++++++------------
>>  2 files changed, 17 insertions(+), 18 deletions(-)
>>
>> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
>> index d29add49b033..c847fc69a2fc 100644
>> --- a/drivers/char/tpm/tpm_tis.c
>> +++ b/drivers/char/tpm/tpm_tis.c
>> @@ -275,9 +275,6 @@ static void tpm_tis_pnp_remove(struct pnp_dev
>> *dev)
>>
>>  	tpm_chip_unregister(chip);
>>  	tpm_tis_remove(chip);
>> -	if (is_bsw())
>> -		iounmap(priv->ilb_base_addr);
>> -
>>  }
>>
>>  static struct pnp_driver tis_pnp_driver = { @@ -329,9 +326,6 @@
>> static int tpm_tis_plat_remove(struct platform_device *pdev)
>>  	tpm_chip_unregister(chip);
>>  	tpm_tis_remove(chip);
>>
>> -	if (is_bsw())
>> -		iounmap(priv->ilb_base_addr);
>> -
>>  	return 0;
>>  }
>>
>> diff --git a/drivers/char/tpm/tpm_tis_core.c
>> b/drivers/char/tpm/tpm_tis_core.c index c2227983ed88..519e4a78c8f8
>> 100644
>> --- a/drivers/char/tpm/tpm_tis_core.c
>> +++ b/drivers/char/tpm/tpm_tis_core.c
>> @@ -37,6 +37,8 @@
>>   */
>>  #define TPM_POLL_SLEEP	1  /* msec */
>>
>> +static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value);
>> +
>>  static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
>>  					bool check_cancel, bool *canceled)  {
>@@ -716,8 +718,7 @@ void
>> tpm_tis_remove(struct tpm_chip *chip)
>>  	u32 interrupt;
>>  	int rc;
>>
>> -	if (chip->ops->clk_enable != NULL)
>> -		chip->ops->clk_enable(chip, true);
>> +	tpm_tis_clkrun_enable(chip, true);
>>
>>  	rc = tpm_tis_read32(priv, reg, &interrupt);
>>  	if (rc < 0)
>> @@ -725,8 +726,10 @@ void tpm_tis_remove(struct tpm_chip *chip)
>>
>>  	tpm_tis_write32(priv, reg, ~TPM_GLOBAL_INT_ENABLE & interrupt);
>>
>> -	if (chip->ops->clk_enable != NULL)
>> -		chip->ops->clk_enable(chip, false);
>> +	tpm_tis_clkrun_enable(chip, false);
>> +
>> +	if (priv->ilb_base_addr)
>> +		iounmap(priv->ilb_base_addr);
>>  }
>>  EXPORT_SYMBOL_GPL(tpm_tis_remove);
>>
>> @@ -736,6 +739,9 @@ void tpm_tis_remove(struct tpm_chip *chip)
>>   * @chip:	TPM chip to use
>>   * @value:	1 - Disable CLKRUN protocol, so that clocks are free running
>>   *		0 - Enable CLKRUN protocol
>> + *
>> + * Call this function directly in tpm_tis_remove() in error or driver
>> + removal
>> + * path, since the chip->ops is set to NULL in tpm_chip_unregister().
>>   */
>>  static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
>> { @@ -922,21 +928,20 @@ int tpm_tis_core_init(struct device *dev,
>> struct tpm_tis_data *priv, int irq,
>>  	}
>>
>>  	rc = tpm_chip_register(chip);
>> -	if (rc && is_bsw())
>> -		iounmap(priv->ilb_base_addr);
>> +	if (rc)
>> +		goto out_err;
>>
>>  	if (chip->ops->clk_enable != NULL)
>>  		chip->ops->clk_enable(chip, false);
>>
>> -	return rc;
>> -out_err:
>> -	tpm_tis_remove(chip);
>> -	if (is_bsw())
>> -		iounmap(priv->ilb_base_addr);
>> +	return 0;
>>
>> -	if (chip->ops->clk_enable != NULL)
>> +out_err:
>> +	if ((chip->ops != NULL) && (chip->ops->clk_enable != NULL))
>>  		chip->ops->clk_enable(chip, false);
>>
>> +	tpm_tis_remove(chip);
>> +
>>  	return rc;
>>  }
>>  EXPORT_SYMBOL_GPL(tpm_tis_core_init);
>> --
>> 1.9.1
>>
>
>Since the original commit is not in the mainline yet, you should rather
>send an updated version of that commit.
>

Ok, I will send an updated version of the original commit "tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()"

>/Jarkko

Regards,
Azhar Shaikh

RE: [PATCH v2] tpm: Fix the driver cleanup code

[Shaikh, Azhar]

>-----Original Message-----
>From: linux-integrity-owner@vger.kernel.org [mailto:linux-integrity-
>owner@vger.kernel.org] On Behalf Of Shaikh, Azhar
>Sent: Friday, December 22, 2017 11:15 AM
>To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
>Cc: jgg@ziepe.ca; javierm@redhat.com; peterhuewe@gmx.de; linux-security-
>module@vger.kernel.org; linux-integrity@vger.kernel.org; linux-
>kernel@vger.kernel.org
>Subject: RE: [PATCH v2] tpm: Fix the driver cleanup code
>
>
>
>>-----Original Message-----
>>From: Jarkko Sakkinen [mailto:jarkko.sakkinen@linux.intel.com]
>>Sent: Friday, December 22, 2017 10:42 AM
>>To: Shaikh, Azhar <azhar.shaikh@intel.com>
>>Cc: jgg@ziepe.ca; javierm@redhat.com; peterhuewe@gmx.de;
>>linux-security- module@vger.kernel.org;
>>linux-integrity@vger.kernel.org; linux- kernel@vger.kernel.org
>>Subject: Re: [PATCH v2] tpm: Fix the driver cleanup code
>>
>>On Thu, Dec 21, 2017 at 03:13:39PM -0800, Azhar Shaikh wrote:
>>> Commit 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout the
>>> duration of transmit_cmd()") added code which accessed
>>> chip->ops, even after it was set to NULL in tpm_del_char_device(),
>>> called from tpm_chip_unregister() in error / driver exit paths.
>>> So fix this code.
>>>
>>> Fixes: 3c1701339284353c41 ("tpm: Keep CLKRUN enabled throughout the
>>> duration of transmit_cmd()")
>>>
>>> Suggested-by: Javier Martinez Canillas <javierm@redhat.com>
>>> Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
>>> Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com>
>>> ---
>>> Changes in v2:
>>> - Remove TPM_CHIP_FLAG_DO_NOT_CLEAR_OPS flag, instead call
>>>   tpm_tis_clkrun_enable() directly in tpm_tis_remove()
>>> - Add comment to tpm_tis_clkrun_enable()
>>>
>>>  drivers/char/tpm/tpm_tis.c      |  6 ------
>>>  drivers/char/tpm/tpm_tis_core.c | 29 +++++++++++++++++------------
>>>  2 files changed, 17 insertions(+), 18 deletions(-)
>>>
>>> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
>>> index d29add49b033..c847fc69a2fc 100644
>>> --- a/drivers/char/tpm/tpm_tis.c
>>> +++ b/drivers/char/tpm/tpm_tis.c
>>> @@ -275,9 +275,6 @@ static void tpm_tis_pnp_remove(struct pnp_dev
>>> *dev)
>>>
>>>  	tpm_chip_unregister(chip);
>>>  	tpm_tis_remove(chip);
>>> -	if (is_bsw())
>>> -		iounmap(priv->ilb_base_addr);
>>> -
>>>  }
>>>
>>>  static struct pnp_driver tis_pnp_driver = { @@ -329,9 +326,6 @@
>>> static int tpm_tis_plat_remove(struct platform_device *pdev)
>>>  	tpm_chip_unregister(chip);
>>>  	tpm_tis_remove(chip);
>>>
>>> -	if (is_bsw())
>>> -		iounmap(priv->ilb_base_addr);
>>> -
>>>  	return 0;
>>>  }
>>>
>>> diff --git a/drivers/char/tpm/tpm_tis_core.c
>>> b/drivers/char/tpm/tpm_tis_core.c index c2227983ed88..519e4a78c8f8
>>> 100644
>>> --- a/drivers/char/tpm/tpm_tis_core.c
>>> +++ b/drivers/char/tpm/tpm_tis_core.c
>>> @@ -37,6 +37,8 @@
>>>   */
>>>  #define TPM_POLL_SLEEP	1  /* msec */
>>>
>>> +static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool
>>> +value);
>>> +
>>>  static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
>>>  					bool check_cancel, bool *canceled)  {
>>@@ -716,8 +718,7 @@ void
>>> tpm_tis_remove(struct tpm_chip *chip)
>>>  	u32 interrupt;
>>>  	int rc;
>>>
>>> -	if (chip->ops->clk_enable != NULL)
>>> -		chip->ops->clk_enable(chip, true);
>>> +	tpm_tis_clkrun_enable(chip, true);
>>>
>>>  	rc = tpm_tis_read32(priv, reg, &interrupt);
>>>  	if (rc < 0)
>>> @@ -725,8 +726,10 @@ void tpm_tis_remove(struct tpm_chip *chip)
>>>
>>>  	tpm_tis_write32(priv, reg, ~TPM_GLOBAL_INT_ENABLE & interrupt);
>>>
>>> -	if (chip->ops->clk_enable != NULL)
>>> -		chip->ops->clk_enable(chip, false);
>>> +	tpm_tis_clkrun_enable(chip, false);
>>> +
>>> +	if (priv->ilb_base_addr)
>>> +		iounmap(priv->ilb_base_addr);
>>>  }
>>>  EXPORT_SYMBOL_GPL(tpm_tis_remove);
>>>
>>> @@ -736,6 +739,9 @@ void tpm_tis_remove(struct tpm_chip *chip)
>>>   * @chip:	TPM chip to use
>>>   * @value:	1 - Disable CLKRUN protocol, so that clocks are free running
>>>   *		0 - Enable CLKRUN protocol
>>> + *
>>> + * Call this function directly in tpm_tis_remove() in error or
>>> + driver removal
>>> + * path, since the chip->ops is set to NULL in tpm_chip_unregister().
>>>   */
>>>  static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value)
>>> { @@ -922,21 +928,20 @@ int tpm_tis_core_init(struct device *dev,
>>> struct tpm_tis_data *priv, int irq,
>>>  	}
>>>
>>>  	rc = tpm_chip_register(chip);
>>> -	if (rc && is_bsw())
>>> -		iounmap(priv->ilb_base_addr);
>>> +	if (rc)
>>> +		goto out_err;
>>>
>>>  	if (chip->ops->clk_enable != NULL)
>>>  		chip->ops->clk_enable(chip, false);
>>>
>>> -	return rc;
>>> -out_err:
>>> -	tpm_tis_remove(chip);
>>> -	if (is_bsw())
>>> -		iounmap(priv->ilb_base_addr);
>>> +	return 0;
>>>
>>> -	if (chip->ops->clk_enable != NULL)
>>> +out_err:
>>> +	if ((chip->ops != NULL) && (chip->ops->clk_enable != NULL))
>>>  		chip->ops->clk_enable(chip, false);
>>>
>>> +	tpm_tis_remove(chip);
>>> +
>>>  	return rc;
>>>  }
>>>  EXPORT_SYMBOL_GPL(tpm_tis_core_init);
>>> --
>>> 1.9.1
>>>
>>
>>Since the original commit is not in the mainline yet, you should rather
>>send an updated version of that commit.
>>
>
>Ok, I will send an updated version of the original commit "tpm: Keep CLKRUN
>enabled throughout the duration of transmit_cmd()"

Should I send the updated commit on top of these 4?

https://patchwork.kernel.org/patch/10125543/ 
https://patchwork.kernel.org/patch/10125535/
https://patchwork.kernel.org/patch/10125509/ 
https://patchwork.kernel.org/patch/10125511/ 

>
>>/Jarkko
>
>Regards,
>Azhar Shaikh

Regards,
Azhar Shaikh