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scsi: ufs: core: Add missing post notify for power mode change

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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: 7eb584db73 ("ufs: refactor configuring power mode")
Cc: stable@vger.kernel.org #6.11.x
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20241122024943.30589-1-peter.wang@mediatek.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang 2024-11-22 10:49:43 +08:00 committed by Martin K. Petersen
parent f10593ad9b
commit 7f45ed5f0c
2 changed files with 10 additions and 7 deletions
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7
drivers/ufs/core/ufshcd.c
View File

@ -4671,9 +4671,6 @@ 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));
}
@ -4702,6 +4699,10 @@ 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);

10
include/ufs/ufshcd.h
View File

@ -310,7 +310,9 @@ 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
@ -353,9 +355,9 @@ 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);