scsi: qla2xxx: Prevent sysfs access when chip is down

Prevent user from sending commands through sysfs while firmware is not
running or reset is in progress.
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_attr.c

@@ -518,6 +518,9 @@ qla2x00_sysfs_write_vpd(struct file *filp, struct kobject *kobj,
 	if (unlikely(pci_channel_offline(ha->pdev)))
 		return 0;
 
+	if (qla2x00_chip_is_down(vha))
+		return 0;
+
 	if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->vpd_size ||
 	    !ha->isp_ops->write_nvram)
 		return 0;
@@ -570,7 +573,7 @@ qla2x00_sysfs_read_sfp(struct file *filp, struct kobject *kobj,
 	if (!capable(CAP_SYS_ADMIN) || off != 0 || count < SFP_DEV_SIZE)
 		return 0;
 
-	if (qla2x00_reset_active(vha))
+	if (qla2x00_chip_is_down(vha))
 		return 0;
 
 	rval = qla2x00_read_sfp_dev(vha, buf, count);
@@ -733,6 +736,15 @@ qla2x00_issue_logo(struct file *filp, struct kobject *kobj,
 	int type;
 	port_id_t did;
 
+	if (!capable(CAP_SYS_ADMIN))
+		return 0;
+
+	if (unlikely(pci_channel_offline(vha->hw->pdev)))
+		return 0;
+
+	if (qla2x00_chip_is_down(vha))
+		return 0;
+
 	type = simple_strtol(buf, NULL, 10);
 
 	did.b.domain = (type & 0x00ff0000) >> 16;
@@ -771,6 +783,12 @@ qla2x00_sysfs_read_xgmac_stats(struct file *filp, struct kobject *kobj,
 	if (!capable(CAP_SYS_ADMIN) || off != 0 || count > XGMAC_DATA_SIZE)
 		return 0;
 
+	if (unlikely(pci_channel_offline(ha->pdev)))
+		return 0;
+
+	if (qla2x00_chip_is_down(vha))
+		return 0;
+
 	if (ha->xgmac_data)
 		goto do_read;
 
@@ -825,6 +843,9 @@ qla2x00_sysfs_read_dcbx_tlv(struct file *filp, struct kobject *kobj,
 	if (ha->dcbx_tlv)
 		goto do_read;
 
+	if (qla2x00_chip_is_down(vha))
+		return 0;
+
 	ha->dcbx_tlv = dma_alloc_coherent(&ha->pdev->dev, DCBX_TLV_DATA_SIZE,
 	    &ha->dcbx_tlv_dma, GFP_KERNEL);
 	if (!ha->dcbx_tlv) {
@@ -1036,7 +1057,7 @@ qla2x00_link_state_show(struct device *dev, struct device_attribute *attr,
 	    vha->device_flags & DFLG_NO_CABLE)
 		len = scnprintf(buf, PAGE_SIZE, "Link Down\n");
 	else if (atomic_read(&vha->loop_state) != LOOP_READY ||
-	    qla2x00_reset_active(vha))
+	    qla2x00_chip_is_down(vha))
 		len = scnprintf(buf, PAGE_SIZE, "Unknown Link State\n");
 	else {
 		len = scnprintf(buf, PAGE_SIZE, "Link Up - ");
@@ -1163,7 +1184,7 @@ qla2x00_beacon_store(struct device *dev, struct device_attribute *attr,
 	if (IS_QLA2100(ha) || IS_QLA2200(ha))
 		return -EPERM;
 
-	if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags)) {
+	if (qla2x00_chip_is_down(vha)) {
 		ql_log(ql_log_warn, vha, 0x707a,
 		    "Abort ISP active -- ignoring beacon request.\n");
 		return -EBUSY;
@@ -1350,7 +1371,7 @@ qla2x00_thermal_temp_show(struct device *dev,
 	scsi_qla_host_t *vha = shost_priv(class_to_shost(dev));
 	uint16_t temp = 0;
 
-	if (qla2x00_reset_active(vha)) {
+	if (qla2x00_chip_is_down(vha)) {
 		ql_log(ql_log_warn, vha, 0x70dc, "ISP reset active.\n");
 		goto done;
 	}
@@ -1381,7 +1402,7 @@ qla2x00_fw_state_show(struct device *dev, struct device_attribute *attr,
 		return scnprintf(buf, PAGE_SIZE, "0x%x\n", pstate);
 	}
 
-	if (qla2x00_reset_active(vha))
+	if (qla2x00_chip_is_down(vha))
 		ql_log(ql_log_warn, vha, 0x707c,
 		    "ISP reset active.\n");
 	else if (!vha->hw->flags.eeh_busy)
@@ -1840,7 +1861,7 @@ qla2x00_get_fc_host_stats(struct Scsi_Host *shost)
 	if (unlikely(pci_channel_offline(ha->pdev)))
 		goto done;
 
-	if (qla2x00_reset_active(vha))
+	if (qla2x00_chip_is_down(vha))
 		goto done;
 
 	stats = dma_zalloc_coherent(&ha->pdev->dev, sizeof(*stats),

drivers/scsi/qla2xxx/qla_init.c

@@ -7017,7 +7017,7 @@ uint8_t qla27xx_find_valid_image(struct scsi_qla_host *vha)
 			ha->active_image = QLA27XX_SECONDARY_IMAGE;
 	}
 
-	ql_dbg(ql_dbg_init, vha, 0x018f, "%s image\n",
+	ql_dbg(ql_dbg_init + ql_dbg_verbose, vha, 0x018f, "%s image\n",
 	    ha->active_image == 0 ? "default bootld and fw" :
 	    ha->active_image == 1 ? "primary" :
 	    ha->active_image == 2 ? "secondary" :

drivers/scsi/qla2xxx/qla_inline.h

@@ -202,6 +202,12 @@ qla2x00_reset_active(scsi_qla_host_t *vha)
 	    test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
 }
 
+static inline int
+qla2x00_chip_is_down(scsi_qla_host_t *vha)
+{
+	return (qla2x00_reset_active(vha) || !vha->hw->flags.fw_started);
+}
+
 static inline srb_t *
 qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
 {