[v17,2/2] ufs: sysfs: Resume the proper scsi device

Commit Message

Asutosh Das (asd) April 8, 2021, 2:49 p.m. UTC

Resumes the actual scsi device the unit descriptor of which
is being accessed instead of the hba alone.

Reviewed-by: Can Guo <[e-mail]>
Signed-off-by: Asutosh Das <[e-mail]>
---
 drivers/scsi/ufs/ufs-sysfs.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

Comments

Adrian Hunter April 10, 2021, 8:57 a.m. UTC | #1

On 8/04/21 5:49 pm, Asutosh Das wrote:
> Resumes the actual scsi device the unit descriptor of which
> is being accessed instead of the hba alone.
> 
> Reviewed-by: Can Guo <[e-mail]>
> Signed-off-by: Asutosh Das <[e-mail]>
> ---
>  drivers/scsi/ufs/ufs-sysfs.c | 30 +++++++++++++++++-------------
>  1 file changed, 17 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
> index d7c3cff..fa57bac 100644
> --- a/drivers/scsi/ufs/ufs-sysfs.c
> +++ b/drivers/scsi/ufs/ufs-sysfs.c

<SNIP>

> @@ -899,11 +899,15 @@ static ssize_t _pname##_show(struct device *dev,			\
>  	struct scsi_device *sdev = to_scsi_device(dev);			\
>  	struct ufs_hba *hba = shost_priv(sdev->host);			\
>  	u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);			\
> +	int ret;							\
>  	if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun,		\
>  				_duname##_DESC_PARAM##_puname))		\
>  		return -EINVAL;						\
> -	return ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname,	\
> +	scsi_autopm_get_device(sdev);					\
> +	ret = ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname,	\
>  		lun, _duname##_DESC_PARAM##_puname, buf, _size);	\
> +	scsi_autopm_put_device(sdev);					\
> +	return ret;							\

I am not sure why this change is needed.  It it is needed, please add
a comment explaining.

Patch

diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index d7c3cff..fa57bac 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -245,9 +245,9 @@  static ssize_t wb_on_store(struct device *dev, struct device_attribute *attr,
 		goto out;
 	}
 
-	pm_runtime_get_sync(hba->dev);
+	scsi_autopm_get_device(hba->sdev_ufs_device);
 	res = ufshcd_wb_toggle(hba, wb_enable);
-	pm_runtime_put_sync(hba->dev);
+	scsi_autopm_put_device(hba->sdev_ufs_device);
 out:
 	up(&hba->host_sem);
 	return res < 0 ? res : count;
@@ -297,10 +297,10 @@  static ssize_t ufs_sysfs_read_desc_param(struct ufs_hba *hba,
 		goto out;
 	}
 
-	pm_runtime_get_sync(hba->dev);
+	scsi_autopm_get_device(hba->sdev_ufs_device);
 	ret = ufshcd_read_desc_param(hba, desc_id, desc_index,
 				param_offset, desc_buf, param_size);
-	pm_runtime_put_sync(hba->dev);
+	scsi_autopm_put_device(hba->sdev_ufs_device);
 	if (ret) {
 		ret = -EINVAL;
 		goto out;
@@ -678,7 +678,7 @@  static ssize_t _name##_show(struct device *dev,				\
 		up(&hba->host_sem);					\
 		return -ENOMEM;						\
 	}								\
-	pm_runtime_get_sync(hba->dev);					\
+	scsi_autopm_get_device(hba->sdev_ufs_device);			\
 	ret = ufshcd_query_descriptor_retry(hba,			\
 		UPIU_QUERY_OPCODE_READ_DESC, QUERY_DESC_IDN_DEVICE,	\
 		0, 0, desc_buf, &desc_len);				\
@@ -695,7 +695,7 @@  static ssize_t _name##_show(struct device *dev,				\
 		goto out;						\
 	ret = sysfs_emit(buf, "%s\n", desc_buf);			\
 out:									\
-	pm_runtime_put_sync(hba->dev);					\
+	scsi_autopm_put_device(hba->sdev_ufs_device);			\
 	kfree(desc_buf);						\
 	up(&hba->host_sem);						\
 	return ret;							\
@@ -744,10 +744,10 @@  static ssize_t _name##_show(struct device *dev,				\
 	}								\
 	if (ufshcd_is_wb_flags(QUERY_FLAG_IDN##_uname))			\
 		index = ufshcd_wb_get_query_index(hba);			\
-	pm_runtime_get_sync(hba->dev);					\
+	scsi_autopm_get_device(hba->sdev_ufs_device);			\
 	ret = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_READ_FLAG,	\
 		QUERY_FLAG_IDN##_uname, index, &flag);			\
-	pm_runtime_put_sync(hba->dev);					\
+	scsi_autopm_put_device(hba->sdev_ufs_device);			\
 	if (ret) {							\
 		ret = -EINVAL;						\
 		goto out;						\
@@ -813,10 +813,10 @@  static ssize_t _name##_show(struct device *dev,				\
 	}								\
 	if (ufshcd_is_wb_attrs(QUERY_ATTR_IDN##_uname))			\
 		index = ufshcd_wb_get_query_index(hba);			\
-	pm_runtime_get_sync(hba->dev);					\
+	scsi_autopm_get_device(hba->sdev_ufs_device);			\
 	ret = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,	\
 		QUERY_ATTR_IDN##_uname, index, 0, &value);		\
-	pm_runtime_put_sync(hba->dev);					\
+	scsi_autopm_put_device(hba->sdev_ufs_device);			\
 	if (ret) {							\
 		ret = -EINVAL;						\
 		goto out;						\
@@ -899,11 +899,15 @@  static ssize_t _pname##_show(struct device *dev,			\
 	struct scsi_device *sdev = to_scsi_device(dev);			\
 	struct ufs_hba *hba = shost_priv(sdev->host);			\
 	u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);			\
+	int ret;							\
 	if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun,		\
 				_duname##_DESC_PARAM##_puname))		\
 		return -EINVAL;						\
-	return ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname,	\
+	scsi_autopm_get_device(sdev);					\
+	ret = ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname,	\
 		lun, _duname##_DESC_PARAM##_puname, buf, _size);	\
+	scsi_autopm_put_device(sdev);					\
+	return ret;							\
 }									\
 static DEVICE_ATTR_RO(_pname)
 
@@ -964,10 +968,10 @@  static ssize_t dyn_cap_needed_attribute_show(struct device *dev,
 		goto out;
 	}
 
-	pm_runtime_get_sync(hba->dev);
+	scsi_autopm_get_device(hba->sdev_ufs_device);
 	ret = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
 		QUERY_ATTR_IDN_DYN_CAP_NEEDED, lun, 0, &value);
-	pm_runtime_put_sync(hba->dev);
+	scsi_autopm_put_device(hba->sdev_ufs_device);
 	if (ret) {
 		ret = -EINVAL;
 		goto out;