[SCSI] qla2xxx: Correct several PCI-EEH issues.

In addition to checking for potentially unnecessary iomem
readX()/writeX() operations, a pci_channel_io_perm_failure should
not trigger a full internal removal.  Found during additional
testing with pSeries blade systems.

Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

3 files changed, 18 insertions, 3 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 15573f6dc36b..b09993a06576 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1282,7 +1282,10 @@ qla2x00_dev_loss_tmo_callbk(struct fc_rport *rport)
         if (!fcport)
                 return;
 
-        qla2x00_abort_fcport_cmds(fcport);
+        if (unlikely(pci_channel_offline(fcport->vha->hw->pdev)))
+                qla2x00_abort_all_cmds(fcport->vha, DID_NO_CONNECT << 16);
+        else
+                qla2x00_abort_fcport_cmds(fcport);
 
         /*
          * Transport has effectively 'deleted' the rport, clear
@@ -1302,6 +1305,10 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
         if (!fcport)
                 return;
 
+        if (unlikely(pci_channel_offline(fcport->vha->hw->pdev))) {
+                qla2x00_abort_all_cmds(fcport->vha, DID_NO_CONNECT << 16);
+                return;
+        }
         /*
          * At this point all fcport's software-states are cleared.  Perform any
          * final cleanup of firmware resources (PCBs and XCBs).
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 951537e30294..e67c1660bf46 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -45,6 +45,9 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
         struct qla_hw_data *ha = vha->hw;
         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 
+        if (ha->pdev->error_state > pci_channel_io_frozen)
+                return QLA_FUNCTION_TIMEOUT;
+
         reg = ha->iobase;
         io_lock_on = base_vha->flags.init_done;
 
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 7e038e4107a5..efe29924e058 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -407,7 +407,10 @@ qla2xxx_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
         int rval;
 
         if (unlikely(pci_channel_offline(ha->pdev))) {
-                cmd->result = DID_REQUEUE << 16;
+                if (ha->pdev->error_state == pci_channel_io_frozen)
+                        cmd->result = DID_REQUEUE << 16;
+                else
+                        cmd->result = DID_NO_CONNECT << 16;
                 goto qc24_fail_command;
         }
 
@@ -2990,6 +2993,8 @@ qla2x00_release_firmware(void)
 static pci_ers_result_t
 qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
 {
+        scsi_qla_host_t *base_vha = pci_get_drvdata(pdev);
+
         switch (state) {
         case pci_channel_io_normal:
                 return PCI_ERS_RESULT_CAN_RECOVER;
@@ -2997,7 +3002,7 @@ qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
                 pci_disable_device(pdev);
                 return PCI_ERS_RESULT_NEED_RESET;
         case pci_channel_io_perm_failure:
-                qla2x00_remove_one(pdev);
+                qla2x00_abort_all_cmds(base_vha, DID_NO_CONNECT << 16);
                 return PCI_ERS_RESULT_DISCONNECT;
         }
         return PCI_ERS_RESULT_NEED_RESET;