| Message ID | 20201208054940.1855-1-stanley.chu@mediatek.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v1] scsi: ufs: Ensure WriteBooster to be re-enabled after device reset | expand |
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 7a7e056a33a9..c22887bee788 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -1218,8 +1218,11 @@ static inline void ufshcd_vops_device_reset(struct ufs_hba *hba) if (hba->vops && hba->vops->device_reset) { int err = hba->vops->device_reset(hba); - if (!err) + if (!err) { ufshcd_set_ufs_dev_active(hba); + hba->wb_enabled = false; + hba->wb_buf_flush_enabled = false; + } if (err != -EOPNOTSUPP) ufshcd_update_reg_hist(&hba->ufs_stats.dev_reset, err); }
UFS 3.1 specification mentions that below WriteBooster flags will be set to default value, say disabled, after power cycle or any type of reset event. Thus we need to reset those flag variables kept in struct hba to align the device status and ensure WriteBooster related functions being configured properly after device reset. Without this fix, WriteBooster will not be enabled successfully by ufshcd_wb_ctrl() after device reset because hba->wb_enabled remains as true. Flags required to be reset to default values: - fWriteBoosterEn: hba->wb_enabled - fWriteBoosterBufferFlushEn: hba->wb_buf_flush_enabled - fWriteBoosterBufferFlushDuringHibernate: No variable mapped Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> --- drivers/scsi/ufs/ufshcd.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)