2020-05-16 17:48:09

by Stanley Chu

Subject: [PATCH v3 2/5] scsi: ufs: Allow WriteBooster on UFS 2.2 devices

According to the UFS specification, WriteBooster is officially
supported by UFS 2.2.

Since UFS 2.2 specification has been finalized in JEDEC and
such devices have also showed up in the market, modify the
checking rule for ufshcd_wb_probe() to allow these devices to enable
WriteBooster.

Signed-off-by: Stanley Chu <[email protected]>
---
drivers/scsi/ufs/ufshcd.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 4a3f3648c64f..f7fa571020da 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6925,6 +6925,7 @@ static int ufs_get_device_desc(struct ufs_hba *hba)
* UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES enabled
*/
if (dev_info->wspecversion >= 0x310 ||
+ dev_info->wspecversion == 0x220 ||
(hba->dev_quirks & UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES))
ufshcd_wb_probe(hba, desc_buf);

--
2.18.0

2020-05-17 06:27:54

by Avri Altman

Subject: RE: [PATCH v3 2/5] scsi: ufs: Allow WriteBooster on UFS 2.2 devices

>
> According to the UFS specification, WriteBooster is officially
> supported by UFS 2.2.
>
> Since UFS 2.2 specification has been finalized in JEDEC and
> such devices have also showed up in the market, modify the
> checking rule for ufshcd_wb_probe() to allow these devices to enable
> WriteBooster.
>
> Signed-off-by: Stanley Chu <[email protected]>
Reviewed-by: Avri Altman <[email protected]>