[PATCH v5 0/9] Add '__adis_enable_irq()'

[PATCH v5 0/9] Add '__adis_enable_irq()'

[Ramona Bolboaca]

Added implementation for '__adis_enable_irq()' and called it instead of
'adis_enable_irq()' inside '__adis_initial_startup()'.
Replaced 'adis_initial_startup()' calls in probe, with its unlocked
variant.

changes in v3:
 new patches: 1,2
 changed commit message for patches 2-9

changes in v4:
 squashed patches 1 & 2 from v3

changes in v5:
 fix compilation error

Ramona Bolboaca (9):
  iio: adis: add '__adis_enable_irq()' implementation
  iio: accel: adis16201: Call '__adis_initial_startup()' in probe
  iio: accel: adis16209: Call '__adis_initial_startup()' in probe
  iio: gyro: adis16136: Call '__adis_initial_startup()' in probe
  iio: gyro: adis16260: Call '__adis_initial_startup()' in probe
  iio: imu: adis16400: Call '__adis_initial_startup()' in probe
  staging: iio: accel: adis16203: Call '__adis_initial_startup()'
  staging: iio: accel: adis16240: Call '__adis_initial_startup()'
  iio: imu: adis: Remove adis_initial_startup function

 drivers/iio/accel/adis16201.c         |  2 +-
 drivers/iio/accel/adis16209.c         |  2 +-
 drivers/iio/gyro/adis16136.c          |  2 +-
 drivers/iio/gyro/adis16260.c          |  2 +-
 drivers/iio/imu/adis.c                | 28 ++++++++++-----------------
 drivers/iio/imu/adis16400.c           |  2 +-
 drivers/staging/iio/accel/adis16203.c |  2 +-
 drivers/staging/iio/accel/adis16240.c |  2 +-
 include/linux/iio/imu/adis.h          | 17 ++++++++--------
 9 files changed, 25 insertions(+), 34 deletions(-)

-- 
2.25.1

[PATCH v5 1/9] iio: adis: add '__adis_enable_irq()' implementation

[Ramona Bolboaca]

Add '__adis_enable_irq()' implementation which is the unlocked
version of 'adis_enable_irq()'.
Call '__adis_enable_irq()' instead of 'adis_enable_irq()' from
'__adis_intial_startup()' to keep the expected unlocked functionality.

Fixes: b600bd7eb3335 ("iio: adis: do not disabe IRQs in 'adis_init()'")
Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/imu/adis.c       | 28 ++++++++++------------------
 include/linux/iio/imu/adis.h | 13 ++++++++++++-
 2 files changed, 22 insertions(+), 19 deletions(-)

diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
index f7fcfd04f659..bc40240b29e2 100644
--- a/drivers/iio/imu/adis.c
+++ b/drivers/iio/imu/adis.c
@@ -270,23 +270,19 @@ EXPORT_SYMBOL_NS(adis_debugfs_reg_access, IIO_ADISLIB);
 #endif
 
 /**
- * adis_enable_irq() - Enable or disable data ready IRQ
+ * __adis_enable_irq() - Enable or disable data ready IRQ (unlocked)
  * @adis: The adis device
  * @enable: Whether to enable the IRQ
  *
  * Returns 0 on success, negative error code otherwise
  */
-int adis_enable_irq(struct adis *adis, bool enable)
+int __adis_enable_irq(struct adis *adis, bool enable)
 {
-	int ret = 0;
+	int ret;
 	u16 msc;
 
-	mutex_lock(&adis->state_lock);
-
-	if (adis->data->enable_irq) {
-		ret = adis->data->enable_irq(adis, enable);
-		goto out_unlock;
-	}
+	if (adis->data->enable_irq)
+		return adis->data->enable_irq(adis, enable);
 
 	if (adis->data->unmasked_drdy) {
 		if (enable)
@@ -294,12 +290,12 @@ int adis_enable_irq(struct adis *adis, bool enable)
 		else
 			disable_irq(adis->spi->irq);
 
-		goto out_unlock;
+		return 0;
 	}
 
 	ret = __adis_read_reg_16(adis, adis->data->msc_ctrl_reg, &msc);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	msc |= ADIS_MSC_CTRL_DATA_RDY_POL_HIGH;
 	msc &= ~ADIS_MSC_CTRL_DATA_RDY_DIO2;
@@ -308,13 +304,9 @@ int adis_enable_irq(struct adis *adis, bool enable)
 	else
 		msc &= ~ADIS_MSC_CTRL_DATA_RDY_EN;
 
-	ret = __adis_write_reg_16(adis, adis->data->msc_ctrl_reg, msc);
-
-out_unlock:
-	mutex_unlock(&adis->state_lock);
-	return ret;
+	return __adis_write_reg_16(adis, adis->data->msc_ctrl_reg, msc);
 }
-EXPORT_SYMBOL_NS(adis_enable_irq, IIO_ADISLIB);
+EXPORT_SYMBOL_NS(__adis_enable_irq, IIO_ADISLIB);
 
 /**
  * __adis_check_status() - Check the device for error conditions (unlocked)
@@ -445,7 +437,7 @@ int __adis_initial_startup(struct adis *adis)
 	 * with 'IRQF_NO_AUTOEN' anyways.
 	 */
 	if (!adis->data->unmasked_drdy)
-		adis_enable_irq(adis, false);
+		__adis_enable_irq(adis, false);
 
 	if (!adis->data->prod_id_reg)
 		return 0;
diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index 515ca09764fe..d789ecf8d0c8 100644
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -402,9 +402,20 @@ static inline int adis_update_bits_base(struct adis *adis, unsigned int reg,
 	__adis_update_bits_base(adis, reg, mask, val, sizeof(val));	\
 })
 
-int adis_enable_irq(struct adis *adis, bool enable);
+static inline int adis_enable_irq(struct adis *adis, bool enable)
+{
+	int ret;
+
+	mutex_lock(&adis->state_lock);
+	ret = __adis_enable_irq(adis, enable);
+	mutex_unlock(&adis->state_lock);
+
+	return ret;
+}
+
 int __adis_check_status(struct adis *adis);
 int __adis_initial_startup(struct adis *adis);
+int __adis_enable_irq(struct adis *adis, bool enable);
 
 static inline int adis_check_status(struct adis *adis)
 {
-- 
2.25.1

[PATCH v5 2/9] iio: accel: adis16201: Call '__adis_initial_startup()' in probe

[Ramona Bolboaca]

Call '__adis_initial_startup()' instead of its locked variant in
'adis16201_probe()'.
The locks are not needed at this point.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/accel/adis16201.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/accel/adis16201.c b/drivers/iio/accel/adis16201.c
index dfb8e2e5bdf5..d054721859b3 100644
--- a/drivers/iio/accel/adis16201.c
+++ b/drivers/iio/accel/adis16201.c
@@ -281,7 +281,7 @@ static int adis16201_probe(struct spi_device *spi)
 	if (ret)
 		return ret;
 
-	ret = adis_initial_startup(st);
+	ret = __adis_initial_startup(st);
 	if (ret)
 		return ret;
 
-- 
2.25.1

[PATCH v5 3/9] iio: accel: adis16209: Call '__adis_initial_startup()' in probe

[Ramona Bolboaca]

Call '__adis_initial_startup()' instead of its locked variant in
'adis16209_probe()'.
The locks are not needed at this point.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/accel/adis16209.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/accel/adis16209.c b/drivers/iio/accel/adis16209.c
index 5a9c6e2296f1..0035e4f4db63 100644
--- a/drivers/iio/accel/adis16209.c
+++ b/drivers/iio/accel/adis16209.c
@@ -291,7 +291,7 @@ static int adis16209_probe(struct spi_device *spi)
 	if (ret)
 		return ret;
 
-	ret = adis_initial_startup(st);
+	ret = __adis_initial_startup(st);
 	if (ret)
 		return ret;
 
-- 
2.25.1

[PATCH v5 4/9] iio: gyro: adis16136: Call '__adis_initial_startup()' in probe

[Ramona Bolboaca]

Call '__adis_initial_startup()' instead of its locked variant in
'adis16136_probe()'.
The locks are not needed at this point.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/gyro/adis16136.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/gyro/adis16136.c b/drivers/iio/gyro/adis16136.c
index 71295709f2b9..c95cf41be34b 100644
--- a/drivers/iio/gyro/adis16136.c
+++ b/drivers/iio/gyro/adis16136.c
@@ -429,7 +429,7 @@ static int adis16136_initial_setup(struct iio_dev *indio_dev)
 	uint16_t prod_id;
 	int ret;
 
-	ret = adis_initial_startup(&adis16136->adis);
+	ret = __adis_initial_startup(&adis16136->adis);
 	if (ret)
 		return ret;
 
-- 
2.25.1

[PATCH v5 5/9] iio: gyro: adis16260: Call '__adis_initial_startup()' in probe

[Ramona Bolboaca]

Call '__adis_initial_startup()' instead of its locked variant in
'adis16260_probe()'.
The locks are not needed at this point.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/gyro/adis16260.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/gyro/adis16260.c b/drivers/iio/gyro/adis16260.c
index eaf57bd339ed..112d635b7dfd 100644
--- a/drivers/iio/gyro/adis16260.c
+++ b/drivers/iio/gyro/adis16260.c
@@ -395,7 +395,7 @@ static int adis16260_probe(struct spi_device *spi)
 		return ret;
 
 	/* Get the device into a sane initial state */
-	ret = adis_initial_startup(&adis16260->adis);
+	ret = __adis_initial_startup(&adis16260->adis);
 	if (ret)
 		return ret;
 
-- 
2.25.1

[PATCH v5 6/9] iio: imu: adis16400: Call '__adis_initial_startup()' in probe

[Ramona Bolboaca]

Call '__adis_initial_startup()' instead of its locked variant in
'adis16400_probe()'.
The locks are not needed at this point.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/imu/adis16400.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/imu/adis16400.c b/drivers/iio/imu/adis16400.c
index 17bb0c40a149..c02fc35dceb4 100644
--- a/drivers/iio/imu/adis16400.c
+++ b/drivers/iio/imu/adis16400.c
@@ -445,7 +445,7 @@ static int adis16400_initial_setup(struct iio_dev *indio_dev)
 	st->adis.spi->mode = SPI_MODE_3;
 	spi_setup(st->adis.spi);
 
-	ret = adis_initial_startup(&st->adis);
+	ret = __adis_initial_startup(&st->adis);
 	if (ret)
 		return ret;
 
-- 
2.25.1

[PATCH v5 7/9] staging: iio: accel: adis16203: Call '__adis_initial_startup()'

[Ramona Bolboaca]

Call '__adis_initial_startup()' instead of its locked variant in
'adis16203_probe()'.
The locks are not needed at this point.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/staging/iio/accel/adis16203.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/iio/accel/adis16203.c b/drivers/staging/iio/accel/adis16203.c
index 62d5397ff1f9..c0e4c9266b5f 100644
--- a/drivers/staging/iio/accel/adis16203.c
+++ b/drivers/staging/iio/accel/adis16203.c
@@ -285,7 +285,7 @@ static int adis16203_probe(struct spi_device *spi)
 		return ret;
 
 	/* Get the device into a sane initial state */
-	ret = adis_initial_startup(st);
+	ret = __adis_initial_startup(st);
 	if (ret)
 		return ret;
 
-- 
2.25.1

[PATCH v5 8/9] staging: iio: accel: adis16240: Call '__adis_initial_startup()'

[Ramona Bolboaca]

Call '__adis_initial_startup()' instead of its locked variant in
'adis16240_probe()'.
The locks are not needed at this point.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/staging/iio/accel/adis16240.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/iio/accel/adis16240.c b/drivers/staging/iio/accel/adis16240.c
index bca857eef92e..337492785f04 100644
--- a/drivers/staging/iio/accel/adis16240.c
+++ b/drivers/staging/iio/accel/adis16240.c
@@ -414,7 +414,7 @@ static int adis16240_probe(struct spi_device *spi)
 		return ret;
 
 	/* Get the device into a sane initial state */
-	ret = adis_initial_startup(st);
+	ret = __adis_initial_startup(st);
 	if (ret)
 		return ret;
 
-- 
2.25.1

[PATCH v5 9/9] iio: imu: adis: Remove adis_initial_startup function

[Ramona Bolboaca]

Remove adis_initial_startup function since it is not used
anymore.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
---
 include/linux/iio/imu/adis.h | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index d789ecf8d0c8..0ace8738552b 100644
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -428,18 +428,6 @@ static inline int adis_check_status(struct adis *adis)
 	return ret;
 }
 
-/* locked version of __adis_initial_startup() */
-static inline int adis_initial_startup(struct adis *adis)
-{
-	int ret;
-
-	mutex_lock(&adis->state_lock);
-	ret = __adis_initial_startup(adis);
-	mutex_unlock(&adis->state_lock);
-
-	return ret;
-}
-
 static inline void adis_dev_lock(struct adis *adis)
 {
 	mutex_lock(&adis->state_lock);
-- 
2.25.1

Re: [PATCH v5 1/9] iio: adis: add '__adis_enable_irq()' implementation

[Jonathan Cameron]

On Mon, 21 Nov 2022 17:27:09 +0200
Ramona Bolboaca <ramona.bolboaca@analog.com> wrote:

> Add '__adis_enable_irq()' implementation which is the unlocked
> version of 'adis_enable_irq()'.
> Call '__adis_enable_irq()' instead of 'adis_enable_irq()' from
> '__adis_intial_startup()' to keep the expected unlocked functionality.
> 
> Fixes: b600bd7eb3335 ("iio: adis: do not disabe IRQs in 'adis_init()'")
> Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
> Reviewed-by: Nuno Sá <nuno.sa@analog.com>

Can you add some explanation in here for 'why' this is a fix.
People need that info to decide whether they want to pick it up for
distros etc.

Jonathan

> ---
>  drivers/iio/imu/adis.c       | 28 ++++++++++------------------
>  include/linux/iio/imu/adis.h | 13 ++++++++++++-
>  2 files changed, 22 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
> index f7fcfd04f659..bc40240b29e2 100644
> --- a/drivers/iio/imu/adis.c
> +++ b/drivers/iio/imu/adis.c
> @@ -270,23 +270,19 @@ EXPORT_SYMBOL_NS(adis_debugfs_reg_access, IIO_ADISLIB);
>  #endif
>  
>  /**
> - * adis_enable_irq() - Enable or disable data ready IRQ
> + * __adis_enable_irq() - Enable or disable data ready IRQ (unlocked)
>   * @adis: The adis device
>   * @enable: Whether to enable the IRQ
>   *
>   * Returns 0 on success, negative error code otherwise
>   */
> -int adis_enable_irq(struct adis *adis, bool enable)
> +int __adis_enable_irq(struct adis *adis, bool enable)
>  {
> -	int ret = 0;
> +	int ret;
>  	u16 msc;
>  
> -	mutex_lock(&adis->state_lock);
> -
> -	if (adis->data->enable_irq) {
> -		ret = adis->data->enable_irq(adis, enable);
> -		goto out_unlock;
> -	}
> +	if (adis->data->enable_irq)
> +		return adis->data->enable_irq(adis, enable);
>  
>  	if (adis->data->unmasked_drdy) {
>  		if (enable)
> @@ -294,12 +290,12 @@ int adis_enable_irq(struct adis *adis, bool enable)
>  		else
>  			disable_irq(adis->spi->irq);
>  
> -		goto out_unlock;
> +		return 0;
>  	}
>  
>  	ret = __adis_read_reg_16(adis, adis->data->msc_ctrl_reg, &msc);
>  	if (ret)
> -		goto out_unlock;
> +		return ret;
>  
>  	msc |= ADIS_MSC_CTRL_DATA_RDY_POL_HIGH;
>  	msc &= ~ADIS_MSC_CTRL_DATA_RDY_DIO2;
> @@ -308,13 +304,9 @@ int adis_enable_irq(struct adis *adis, bool enable)
>  	else
>  		msc &= ~ADIS_MSC_CTRL_DATA_RDY_EN;
>  
> -	ret = __adis_write_reg_16(adis, adis->data->msc_ctrl_reg, msc);
> -
> -out_unlock:
> -	mutex_unlock(&adis->state_lock);
> -	return ret;
> +	return __adis_write_reg_16(adis, adis->data->msc_ctrl_reg, msc);
>  }
> -EXPORT_SYMBOL_NS(adis_enable_irq, IIO_ADISLIB);
> +EXPORT_SYMBOL_NS(__adis_enable_irq, IIO_ADISLIB);
>  
>  /**
>   * __adis_check_status() - Check the device for error conditions (unlocked)
> @@ -445,7 +437,7 @@ int __adis_initial_startup(struct adis *adis)
>  	 * with 'IRQF_NO_AUTOEN' anyways.
>  	 */
>  	if (!adis->data->unmasked_drdy)
> -		adis_enable_irq(adis, false);
> +		__adis_enable_irq(adis, false);
>  
>  	if (!adis->data->prod_id_reg)
>  		return 0;
> diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
> index 515ca09764fe..d789ecf8d0c8 100644
> --- a/include/linux/iio/imu/adis.h
> +++ b/include/linux/iio/imu/adis.h
> @@ -402,9 +402,20 @@ static inline int adis_update_bits_base(struct adis *adis, unsigned int reg,
>  	__adis_update_bits_base(adis, reg, mask, val, sizeof(val));	\
>  })
>  
> -int adis_enable_irq(struct adis *adis, bool enable);
> +static inline int adis_enable_irq(struct adis *adis, bool enable)
> +{
> +	int ret;
> +
> +	mutex_lock(&adis->state_lock);
> +	ret = __adis_enable_irq(adis, enable);
> +	mutex_unlock(&adis->state_lock);
> +
> +	return ret;
> +}
> +
>  int __adis_check_status(struct adis *adis);
>  int __adis_initial_startup(struct adis *adis);
> +int __adis_enable_irq(struct adis *adis, bool enable);
>  
>  static inline int adis_check_status(struct adis *adis)
>  {