[SCSI] qla4xxx: Fix double IDC locking in qla4_8xxx_error_recovery

Issue:
In qla4_8xxx_error_recovery() IDC lock recovery is initiated as
IDC lock is held while enabling the interrupts

Fix:
Correctly handle IDC locking mechanism in qla4_8xxx_error_recovery().

Signed-off-by: Poornima Vonti <poornima.vonti@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index c1093eb16e2efae0c80a5e8461d20384e4bb00a7..afaba52ff250b7c4e2e5fae535e6db5233c904f1 100644 (file)
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -6140,22 +6140,25 @@ static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
                ha->isp_ops->idc_unlock(ha);
                clear_bit(AF_FW_RECOVERY, &ha->flags);
                rval = qla4xxx_initialize_adapter(ha, RESET_ADAPTER);
-               ha->isp_ops->idc_lock(ha);
 
                if (rval != QLA_SUCCESS) {
                        ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
                            "FAILED\n", ha->host_no, __func__);
+                       ha->isp_ops->idc_lock(ha);
                        qla4_8xxx_clear_drv_active(ha);
                        qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DEV_STATE,
                                            QLA8XXX_DEV_FAILED);
+                       ha->isp_ops->idc_unlock(ha);
                } else {
                        ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
                            "READY\n", ha->host_no, __func__);
+                       ha->isp_ops->idc_lock(ha);
                        qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DEV_STATE,
                                            QLA8XXX_DEV_READY);
                        /* Clear driver state register */
                        qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DRV_STATE, 0);
                        qla4_8xxx_set_drv_active(ha);
+                       ha->isp_ops->idc_unlock(ha);
                        ret = qla4xxx_request_irqs(ha);
                        if (ret) {
                                ql4_printk(KERN_WARNING, ha, "Failed to "
@@ -6167,7 +6170,6 @@ static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
                                rval = QLA_SUCCESS;
                        }
                }
-               ha->isp_ops->idc_unlock(ha);
        } else {
                ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
                    "the reset owner\n", ha->host_no, __func__,