[PATCH 0/2] PM / devfreq: Use the resource-managed function for devfreq device

[PATCH 0/2] PM / devfreq: Use the resource-managed function for devfreq device

[Chanwoo Choi]

This patch just uses the resource-managed function when adding the new devfreq
deivce. This function handles the memory and delete of devfreq instance
automatically.

Chanwoo Choi (2):
  PM / devfreq: rk3399_dmc: Use the resource-managed function to add devfreq dev
  scsi: ufs: Use the resource-managed function to add devfreq device

 drivers/devfreq/rk3399_dmc.c | 2 +-
 drivers/scsi/ufs/ufshcd.c    | 4 +---
 2 files changed, 2 insertions(+), 4 deletions(-)

-- 
1.9.1

[PATCH 1/2] PM / devfreq: rk3399_dmc: Use the resource-managed function to add devfreq dev

[Chanwoo Choi]

This patch uses the resource-managed to add the devfreq device.
This function will make it easy to handle the devfreq device.

- struct devfreq *devm_devfreq_add_device(struct device *dev,
				  struct devfreq_dev_profile *profile,
				  const char *governor_name,
				  void *data);

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 drivers/devfreq/rk3399_dmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c
index e24b73d66659..3f8f4381cd4a 100644
--- a/drivers/devfreq/rk3399_dmc.c
+++ b/drivers/devfreq/rk3399_dmc.c
@@ -436,7 +436,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 
 	rk3399_devfreq_dmc_profile.initial_freq = data->rate;
 
-	data->devfreq = devfreq_add_device(dev,
+	data->devfreq = devm_devfreq_add_device(dev,
 					   &rk3399_devfreq_dmc_profile,
 					   "simple_ondemand",
 					   &data->ondemand_data);
-- 
1.9.1

[PATCH 2/2] scsi: ufs: Use the resource-managed function to add devfreq device

[Chanwoo Choi]

This patch uses the resource-managed to add the devfreq device.
This function will make it easy to handle the devfreq device.

- struct devfreq *devm_devfreq_add_device(struct device *dev,
				  struct devfreq_dev_profile *profile,
				  const char *governor_name,
				  void *data);
Cc: Vinayak Holikatti <vinholikatti@gmail.com>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 drivers/scsi/ufs/ufshcd.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index f08d41a2d70b..e639071fd3a1 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6198,8 +6198,6 @@ void ufshcd_remove(struct ufs_hba *hba)
 	scsi_host_put(hba->host);
 
 	ufshcd_exit_clk_gating(hba);
-	if (ufshcd_is_clkscaling_enabled(hba))
-		devfreq_remove_device(hba->devfreq);
 	ufshcd_hba_exit(hba);
 }
 EXPORT_SYMBOL_GPL(ufshcd_remove);
@@ -6495,7 +6493,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 	}
 
 	if (ufshcd_is_clkscaling_enabled(hba)) {
-		hba->devfreq = devfreq_add_device(dev, &ufs_devfreq_profile,
+		hba->devfreq = devm_devfreq_add_device(dev, &ufs_devfreq_profile,
 						   "simple_ondemand", NULL);
 		if (IS_ERR(hba->devfreq)) {
 			dev_err(hba->dev, "Unable to register with devfreq %ld\n",
-- 
1.9.1

[PATCH 2/2] scsi: ufs: Use the resource-managed function to add devfreq device

[Chanwoo Choi]

This patch uses the resource-managed to add the devfreq device.
This function will make it easy to handle the devfreq device.

- struct devfreq *devm_devfreq_add_device(struct device *dev,
				  struct devfreq_dev_profile *profile,
				  const char *governor_name,
				  void *data);
Cc: Vinayak Holikatti <vinholikatti@gmail.com>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 drivers/scsi/ufs/ufshcd.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index f08d41a2d70b..e639071fd3a1 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6198,8 +6198,6 @@ void ufshcd_remove(struct ufs_hba *hba)
 	scsi_host_put(hba->host);
 
 	ufshcd_exit_clk_gating(hba);
-	if (ufshcd_is_clkscaling_enabled(hba))
-		devfreq_remove_device(hba->devfreq);
 	ufshcd_hba_exit(hba);
 }
 EXPORT_SYMBOL_GPL(ufshcd_remove);
@@ -6495,7 +6493,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 	}
 
 	if (ufshcd_is_clkscaling_enabled(hba)) {
-		hba->devfreq = devfreq_add_device(dev, &ufs_devfreq_profile,
+		hba->devfreq = devm_devfreq_add_device(dev, &ufs_devfreq_profile,
 						   "simple_ondemand", NULL);
 		if (IS_ERR(hba->devfreq)) {
 			dev_err(hba->dev, "Unable to register with devfreq %ld\n",
-- 
1.9.1

Re: [PATCH 2/2] scsi: ufs: Use the resource-managed function to add devfreq device

[Subhash Jadavani]

On 2016-10-26 00:38, Chanwoo Choi wrote:
> This patch uses the resource-managed to add the devfreq device.
> This function will make it easy to handle the devfreq device.
> 
> - struct devfreq *devm_devfreq_add_device(struct device *dev,
> 				  struct devfreq_dev_profile *profile,
> 				  const char *governor_name,
> 				  void *data);
> Cc: Vinayak Holikatti <vinholikatti@gmail.com>
> Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
> Cc: Martin K. Petersen <martin.petersen@oracle.com>
> Cc: linux-scsi@vger.kernel.org
> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
> ---
>  drivers/scsi/ufs/ufshcd.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index f08d41a2d70b..e639071fd3a1 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -6198,8 +6198,6 @@ void ufshcd_remove(struct ufs_hba *hba)
>  	scsi_host_put(hba->host);
> 
>  	ufshcd_exit_clk_gating(hba);
> -	if (ufshcd_is_clkscaling_enabled(hba))
> -		devfreq_remove_device(hba->devfreq);
>  	ufshcd_hba_exit(hba);
>  }
>  EXPORT_SYMBOL_GPL(ufshcd_remove);
> @@ -6495,7 +6493,7 @@ int ufshcd_init(struct ufs_hba *hba, void
> __iomem *mmio_base, unsigned int irq)
>  	}
> 
>  	if (ufshcd_is_clkscaling_enabled(hba)) {
> -		hba->devfreq = devfreq_add_device(dev, &ufs_devfreq_profile,
> +		hba->devfreq = devm_devfreq_add_device(dev, &ufs_devfreq_profile,
>  						   "simple_ondemand", NULL);
>  		if (IS_ERR(hba->devfreq)) {
>  			dev_err(hba->dev, "Unable to register with devfreq %ld\n",

This change looks good to me but this will have merge conflicts if this 
gets in after my patch series "	[PATCH v1 00/11] scsi: ufs: bug fixes 
patch series #1" (due to "[PATCH v1 06/11] scsi: ufs: suspend clock 
scaling for failed runtime_resume"). so if you can, please pull in my 
patch series and rebase your change on top of it and send it out again.

Thanks,
Subhash

-- 
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project