| Message ID | 1539711249-12634-1-git-send-email-bly@catalogicsoftware.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | scsi: ibmvscsi_tgt: Remove target_wait_for_sess_cmd() | expand |
On 10/16/2018 12:34 PM, Ly, Bryant wrote: > From: "Bryant G. Ly" <bly@catalogicsoftware.com> > > There is currently a bug with the driver where there is never a > call to target_sess_cmd_list_set_waiting(), it only called > target_wait_for_sess_cmd(), which basically means that the > sess_wait_list would always be empty. > > Thus, list_empty(&sess->sess_wait_list) = true, > (eg: no se_cmd I/O is quiesced, because no se_cmd in sess_wait_list), > since commit 712db3eb2c35 ("scsi: ibmvscsis: Properly deregister > target sessions") in 4.9.y code. > > ibmvscsi_tgt does not remove the I_T Nexus when a VM is > active so we can fix this issue by removing the call to > target_wait_for_sess_cmd() altogether. > > Signed-off-by: Bryant G. Ly <bly@catalogicsoftware.com> > --- > drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c > index fac3773..2175e9e 100644 > --- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c > +++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c > @@ -2266,7 +2266,6 @@ static int ibmvscsis_drop_nexus(struct ibmvscsis_tport *tport) > /* > * Release the SCSI I_T Nexus to the emulated ibmvscsis Target Port > */ > - target_wait_for_sess_cmds(se_sess); > target_remove_session(se_sess); > tport->ibmv_nexus = NULL; > kfree(nexus); > Reviewed-by: Mike Christie <mchristi@redhat.com>
Bryant, > There is currently a bug with the driver where there is never a call > to target_sess_cmd_list_set_waiting(), it only called > target_wait_for_sess_cmd(), which basically means that the > sess_wait_list would always be empty. > > Thus, list_empty(&sess->sess_wait_list) = true, (eg: no se_cmd I/O is > quiesced, because no se_cmd in sess_wait_list), since commit > 712db3eb2c35 ("scsi: ibmvscsis: Properly deregister target sessions") > in 4.9.y code. > > ibmvscsi_tgt does not remove the I_T Nexus when a VM is active so we > can fix this issue by removing the call to target_wait_for_sess_cmd() > altogether. Applied to 4.20/scsi-queue, thanks!
diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c index fac3773..2175e9e 100644 --- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c +++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c @@ -2266,7 +2266,6 @@ static int ibmvscsis_drop_nexus(struct ibmvscsis_tport *tport) /* * Release the SCSI I_T Nexus to the emulated ibmvscsis Target Port */ - target_wait_for_sess_cmds(se_sess); target_remove_session(se_sess); tport->ibmv_nexus = NULL; kfree(nexus);