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Commit 4dc77c36 authored May 15, 2012 by Joe Carnuccio Committed by James Bottomley May 22, 2012

[SCSI] qla2xxx: Avoid losing any fc ports when loop id's are exhausted.



Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

parent daae62a3

drivers/scsi/qla2xxx/qla_init.c

+20 −63

Original line number	Diff line number	Diff line
		@@ -2910,7 +2910,7 @@ static int
		qla2x00_configure_fabric(scsi_qla_host_t *vha)
		{
		int rval;
		fc_port_t fcport, fcptemp;
		fc_port_t *fcport;
		uint16_t next_loopid;
		uint16_t mb[MAILBOX_REGISTER_COUNT];
		uint16_t loop_id;
		@@ -2948,7 +2948,7 @@ qla2x00_configure_fabric(scsi_qla_host_t *vha)
		0xfc, mb, BIT_1\|BIT_0);
		if (rval != QLA_SUCCESS) {
		set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
		return rval;
		break;
		}
		if (mb[0] != MBS_COMMAND_COMPLETE) {
		ql_dbg(ql_dbg_disc, vha, 0x2042,
		@@ -2984,10 +2984,12 @@ qla2x00_configure_fabric(scsi_qla_host_t *vha)
		if (rval != QLA_SUCCESS)
		break;

		/*
		* Logout all previous fabric devices marked lost, except
		* FCP2 devices.
		*/
		/* Add new ports to existing port list */
		list_splice_tail_init(&new_fcports, &vha->vp_fcports);

		/* Starting free loop ID. */
		next_loopid = ha->min_external_loopid;

		list_for_each_entry(fcport, &vha->vp_fcports, list) {
		if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
		break;
		@@ -2995,6 +2997,7 @@ qla2x00_configure_fabric(scsi_qla_host_t *vha)
		if ((fcport->flags & FCF_FABRIC_DEVICE) == 0)
		continue;

		/* Logout lost/gone fabric devices (non-FCP2) */
		if (fcport->scan_state != QLA_FCPORT_SCAN_FOUND &&
		atomic_read(&fcport->state) == FCS_ONLINE) {
		qla2x00_mark_device_lost(vha, fcport,
		@@ -3008,76 +3011,30 @@ qla2x00_configure_fabric(scsi_qla_host_t *vha)
		fcport->d_id.b.domain,
		fcport->d_id.b.area,
		fcport->d_id.b.al_pa);
		fcport->loop_id = FC_NO_LOOP_ID;
		}
		continue;
		}
		fcport->scan_state = QLA_FCPORT_SCAN_NONE;
		}

		/* Starting free loop ID. */
		next_loopid = ha->min_external_loopid;

		/*
		* Scan through our port list and login entries that need to be
		* logged in.
		*/
		list_for_each_entry(fcport, &vha->vp_fcports, list) {
		if (atomic_read(&vha->loop_down_timer) \|\|
		test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
		break;

		if ((fcport->flags & FCF_FABRIC_DEVICE) == 0 \|\|
		(fcport->flags & FCF_LOGIN_NEEDED) == 0)
		continue;

		/* Login fabric devices that need a login */
		if ((fcport->flags & FCF_LOGIN_NEEDED) != 0 &&
		atomic_read(&vha->loop_down_timer) == 0) {
		if (fcport->loop_id == FC_NO_LOOP_ID) {
		fcport->loop_id = next_loopid;
		rval = qla2x00_find_new_loop_id(
		base_vha, fcport);
		if (rval != QLA_SUCCESS) {
		/* Ran out of IDs to use */
		break;
		}
		continue;
		}
		/* Login and update database */
		qla2x00_fabric_dev_login(vha, fcport, &next_loopid);
		}

		/* Exit if out of loop IDs. */
		if (rval != QLA_SUCCESS) {
		break;
		}

		/*
		* Login and add the new devices to our port list.
		*/
		list_for_each_entry_safe(fcport, fcptemp, &new_fcports, list) {
		if (atomic_read(&vha->loop_down_timer) \|\|
		test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
		break;

		/* Find a new loop ID to use. */
		fcport->loop_id = next_loopid;
		rval = qla2x00_find_new_loop_id(base_vha, fcport);
		if (rval != QLA_SUCCESS) {
		/* Ran out of IDs to use */
		break;
		}

		/* Login and update database */
		qla2x00_fabric_dev_login(vha, fcport, &next_loopid);

		list_move_tail(&fcport->list, &vha->vp_fcports);
		}
		} while (0);

		/* Free all new device structures not processed. */
		list_for_each_entry_safe(fcport, fcptemp, &new_fcports, list) {
		list_del(&fcport->list);
		kfree(fcport);
		}

		if (rval) {
		ql_dbg(ql_dbg_disc, vha, 0x2068,
		"Configure fabric error exit rval=%d.\n", rval);