scsi: qla2xxx: Handle PCIe error for driver

Driver will perform following

- Set PFLG_DRIVER_REMOVING flag and do not disable PCIe error reporting
  during adapter shutdown.
- If PCIe device count is already zero, return correct error type from
  PCI error interface.
- When device is offline, return correct error type from PCIe error
  path.
- If there is board disable thread active during shutdown and PCIe
  device count is zero then cancel scheduling board disable thread
  during shutdown and return.

Signed-off-by: Sawan Chandak <sawan.chandak@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index b43520c..d668ed4 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3385,12 +3385,22 @@ qla2x00_shutdown(struct pci_dev *pdev)
        scsi_qla_host_t *vha;
        struct qla_hw_data  *ha;
 
-       if (!atomic_read(&pdev->enable_cnt))
-               return;
-
        vha = pci_get_drvdata(pdev);
        ha = vha->hw;
 
+       ql_log(ql_log_info, vha, 0xfffa,
+               "Adapter shutdown\n");
+
+       /*
+        * Prevent future board_disable and wait
+        * until any pending board_disable has completed.
+        */
+       set_bit(PFLG_DRIVER_REMOVING, &vha->pci_flags);
+       cancel_work_sync(&ha->board_disable);
+
+       if (!atomic_read(&pdev->enable_cnt))
+               return;
+
        /* Notify ISPFX00 firmware */
        if (IS_QLAFX00(ha))
                qlafx00_driver_shutdown(vha, 20);
@@ -3421,8 +3431,9 @@ qla2x00_shutdown(struct pci_dev *pdev)
 
        qla2x00_free_fw_dump(ha);
 
-       pci_disable_pcie_error_reporting(pdev);
        pci_disable_device(pdev);
+       ql_log(ql_log_info, vha, 0xfffe,
+               "Adapter shutdown successfully.\n");
 }
 
 /* Deletes all the virtual ports for a given ha */
@@ -5495,6 +5506,13 @@ qla2x00_disable_board_on_pci_error(struct work_struct *work)
        ql_log(ql_log_warn, base_vha, 0x015b,
            "Disabling adapter.\n");
 
+       if (!atomic_read(&pdev->enable_cnt)) {
+               ql_log(ql_log_info, base_vha, 0xfffc,
+                   "PCI device disabled, no action req for PCI error=%lx\n",
+                   base_vha->pci_flags);
+               return;
+       }
+
        qla2x00_wait_for_sess_deletion(base_vha);
 
        set_bit(UNLOADING, &base_vha->dpc_flags);
@@ -6197,6 +6215,12 @@ qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
        ql_dbg(ql_dbg_aer, vha, 0x9000,
            "PCI error detected, state %x.\n", state);
 
+       if (!atomic_read(&pdev->enable_cnt)) {
+               ql_log(ql_log_info, vha, 0xffff,
+                       "PCI device is disabled,state %x\n", state);
+               return PCI_ERS_RESULT_NEED_RESET;
+       }
+
        switch (state) {
        case pci_channel_io_normal:
                ha->flags.eeh_busy = 0;