[SCSI] ibmvfc: Handle port login required response

The virtual fibre channel stack can return a failure response for a command
indicating the port login has been invalidated without sending the client
an async event. Add code to handle this response and initiate a PLOGI.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index eb79f755dad0..8715a7b140cc 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -121,6 +121,7 @@ static const struct {
         { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" },
         { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" },
         { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
+        { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
         { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" },
 
         { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" },
@@ -1475,6 +1476,8 @@ static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
                                 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len;
                         if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8)
                                 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
+                        if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
+                                ibmvfc_reinit_host(evt->vhost);
 
                         if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
                                 cmnd->result = (DID_ERROR << 16);
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
index 526bca743c81..6b86e1f69f69 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.h
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -109,6 +109,7 @@ enum ibmvfc_vios_errors {
         IBMVFC_TRANS_CANCELLED                  = 0x0006,
         IBMVFC_TRANS_CANCELLED_IMPLICIT = 0x0007,
         IBMVFC_INSUFFICIENT_RESOURCE            = 0x0008,
+        IBMVFC_PLOGI_REQUIRED                   = 0x0010,
         IBMVFC_COMMAND_FAILED                   = 0x8000,
 };