RE: [PATCH v3 2/2] scsi: ufs: wb: Add Manual Flush sysfs

[Avri Altman]

> There is the following quirk to bypass "WB Manual Flush" in Write Booster.
> 
>         - UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL
> 
> If this quirk is not set, there is no knob that can control "WB Manual Flush".
> 
> There are three flags that control Write Booster Feature.
>         1. WB ON/OFF
>         2. WB Hibern Flush ON/OFF
>         3. WB Flush ON/OFF
> 
> The sysfs that controls the WB was implemented. (1)
> 
> In the case of "Hibern Flush", it is always good to turn on.
> Control may not be required. (2)
> 
> Finally, "Manual flush" may be necessary because the Auto-Hibern8 is not
> supported in a specific environment.
> So the sysfs that controls this is necessary. (3)
> 
> Signed-off-by: Jinyoung Choi <j-young.choi@xxxxxxxxxxx>
Reviewed-by: Avri Altman <avri.altman@xxxxxxx>