> > Block layer RPM is enabled for the genernal UFS SCSI devices when they are > probed by their driver. However block layer RPM is not enabled for UFS > well-known SCSI devices. > > As UFS SCSI devices have their corresponding BSG char devices, accessing > a BSG char device via IOCTL may send requests to its corresponding SCSI > device through its request queue. If BSG IOCTL sends a request to a > well-known SCSI device when hba is not runtime active, due to block layer > RPM is not eanbled for the well-known SCSI devices, hba, which is at the > top of a scsi device's parent chain, shall not be resumed, then unexpected > error would happen. > > This change enables block layer RPM for the well-known SCSI devices, so > that block layer can handle RPM for the well-known SCSI devices just like > for the general SCSI devices. > > Signed-off-by: Can Guo <cang@xxxxxxxxxxxxxx> Reviewed-by: Avri Altman <avri.altman@xxxxxxx>
