From: Peter Wang <peter.wang@xxxxxxxxxxxx>
When the power mode change is successful but the power mode
hasn't actually changed, the post notification was missed.
Similar to the approach with hibernate/clock scale/hce enable,
having pre/post notifications in the same function will
make it easier to maintain.
Additionally, supplement the description of power parameters
for the pwr_change_notify callback.
Fixes: 7eb584db73be ("ufs: refactor configuring power mode")
Cc: stable@xxxxxxxxxxxxxxx #6.11.x
Signed-off-by: Peter Wang <peter.wang@xxxxxxxxxxxx>
---
drivers/ufs/core/ufshcd.c | 7 ++++---
include/ufs/ufshcd.h | 10 ++++++----
2 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index abbe7135a977..814402e93a1e 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -4651,9 +4651,6 @@ static int ufshcd_change_power_mode(struct ufs_hba *hba,
dev_err(hba->dev,
"%s: power mode change failed %d\n", __func__, ret);
} else {
- ufshcd_vops_pwr_change_notify(hba, POST_CHANGE, NULL,
- pwr_mode);
-
memcpy(&hba->pwr_info, pwr_mode,
sizeof(struct ufs_pa_layer_attr));
}
@@ -4682,6 +4679,10 @@ int ufshcd_config_pwr_mode(struct ufs_hba *hba,
ret = ufshcd_change_power_mode(hba, &final_params);
+ if (!ret)
+ ufshcd_vops_pwr_change_notify(hba, POST_CHANGE, NULL,
+ &final_params);
+
return ret;
}
EXPORT_SYMBOL_GPL(ufshcd_config_pwr_mode);
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 3f68ae3e4330..1db754b4a4d6 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -308,7 +308,9 @@ struct ufs_pwr_mode_info {
* to allow variant specific Uni-Pro initialization.
* @pwr_change_notify: called before and after a power mode change
* is carried out to allow vendor spesific capabilities
- * to be set.
+ * to be set. PRE_CHANGE can modify final_params based
+ * on desired_pwr_mode, but POST_CHANGE must not alter
+ * the final_params parameter
* @setup_xfer_req: called before any transfer request is issued
* to set some things
* @setup_task_mgmt: called before any task management request is issued
@@ -350,9 +352,9 @@ struct ufs_hba_variant_ops {
int (*link_startup_notify)(struct ufs_hba *,
enum ufs_notify_change_status);
int (*pwr_change_notify)(struct ufs_hba *,
- enum ufs_notify_change_status status,
- struct ufs_pa_layer_attr *,
- struct ufs_pa_layer_attr *);
+ enum ufs_notify_change_status status,
+ struct ufs_pa_layer_attr *desired_pwr_mode,
+ struct ufs_pa_layer_attr *final_params);
void (*setup_xfer_req)(struct ufs_hba *hba, int tag,
bool is_scsi_cmd);
void (*setup_task_mgmt)(struct ufs_hba *, int, u8);
--
2.18.0
