Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] fix check of PQ and PDT bits for WLUNs
  [SCSI] make scsi_check_sense HARDWARE_ERROR return ADD_TO_MLQUEUE on retry
  [SCSI] scsi_dh: make check_sense return ADD_TO_MLQUEUE
  [SCSI] zfcp: Remove duplicated unlikely() macros.
  [SCSI] zfcp: channel cannot be detached due to refcount imbalance
  [SCSI] zfcp: Fix reference counter for remote ports
  [SCSI] zfcp: Simplify ccw notify handler
  [SCSI] zfcp: Correctly query end flag in gpn_ft response
  [SCSI] zfcp: Fix request queue locking
  [SCSI] sd: select CRC_T10DIF only when necessary

4 files changed, 59 insertions, 72 deletions

diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index 391dd29749f8..51b6a05f4d12 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -152,10 +152,8 @@ static int zfcp_ccw_set_offline(struct ccw_device *ccw_device)
  */
 static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event)
 {
-	struct zfcp_adapter *adapter;
+	struct zfcp_adapter *adapter = dev_get_drvdata(&ccw_device->dev);
 
-	down(&zfcp_data.config_sema);
-	adapter = dev_get_drvdata(&ccw_device->dev);
 	switch (event) {
 	case CIO_GONE:
 		dev_warn(&adapter->ccw_device->dev, "device gone\n");
@@ -174,8 +172,6 @@ static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event)
 					89, NULL);
 		break;
 	}
-	zfcp_erp_wait(adapter);
-	up(&zfcp_data.config_sema);
 	return 1;
 }
 
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index e984469bb98b..56196c98c07b 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -39,18 +39,6 @@ struct zfcp_gpn_ft {
 	struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS];
 };
 
-static struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *adapter,
-					      u32 d_id)
-{
-	struct zfcp_port *port;
-
-	list_for_each_entry(port, &adapter->port_list_head, list)
-		if ((port->d_id == d_id) &&
-		    !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
-			return port;
-	return NULL;
-}
-
 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
 				   struct fcp_rscn_element *elem)
 {
@@ -341,12 +329,13 @@ void zfcp_test_link(struct zfcp_port *port)
 
 	zfcp_port_get(port);
 	retval = zfcp_fc_adisc(port);
-	if (retval == 0 || retval == -EBUSY)
+	if (retval == 0)
 		return;
 
 	/* send of ADISC was not possible */
 	zfcp_port_put(port);
-	zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
+	if (retval != -EBUSY)
+		zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
 }
 
 static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter)
@@ -363,7 +352,6 @@ static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter)
 		if (ret)
 			return ret;
 		zfcp_erp_wait(adapter);
-		zfcp_port_put(adapter->nameserver_port);
 	}
 	return !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
 				  &adapter->nameserver_port->status);
@@ -475,7 +463,7 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
 	struct zfcp_adapter *adapter = ct->port->adapter;
 	struct zfcp_port *port, *tmp;
 	u32 d_id;
-	int ret = 0, x;
+	int ret = 0, x, last = 0;
 
 	if (ct->status)
 		return -EIO;
@@ -492,19 +480,24 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
 	down(&zfcp_data.config_sema);
 
 	/* first entry is the header */
-	for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES; x++) {
+	for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES && !last; x++) {
 		if (x % (ZFCP_GPN_FT_ENTRIES + 1))
 			acc++;
 		else
 			acc = sg_virt(++sg);
 
+		last = acc->control & 0x80;
 		d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 |
 		       acc->port_id[2];
 
 		/* skip the adapter's port and known remote ports */
-		if (acc->wwpn == fc_host_port_name(adapter->scsi_host) ||
-		     zfcp_get_port_by_did(adapter, d_id))
+		if (acc->wwpn == fc_host_port_name(adapter->scsi_host))
+			continue;
+		port = zfcp_get_port_by_wwpn(adapter, acc->wwpn);
+		if (port) {
+			zfcp_port_get(port);
 			continue;
+		}
 
 		port = zfcp_port_enqueue(adapter, acc->wwpn,
 					 ZFCP_STATUS_PORT_DID_DID |
@@ -513,8 +506,6 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
 			ret = PTR_ERR(port);
 		else
 			zfcp_erp_port_reopen(port, 0, 149, NULL);
-		if (acc->control & 0x80) /* last entry */
-			break;
 	}
 
 	zfcp_erp_wait(adapter);
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 19c1ca913874..49dbeb754e5f 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -710,10 +710,10 @@ static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 
 static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue)
 {
-	spin_lock(&queue->lock);
+	spin_lock_bh(&queue->lock);
 	if (atomic_read(&queue->count))
 		return 1;
-	spin_unlock(&queue->lock);
+	spin_unlock_bh(&queue->lock);
 	return 0;
 }
 
@@ -722,13 +722,13 @@ static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
 	long ret;
 	struct zfcp_qdio_queue *req_q = &adapter->req_q;
 
-	spin_unlock(&req_q->lock);
+	spin_unlock_bh(&req_q->lock);
 	ret = wait_event_interruptible_timeout(adapter->request_wq,
 					zfcp_fsf_sbal_check(req_q), 5 * HZ);
 	if (ret > 0)
 		return 0;
 
-	spin_lock(&req_q->lock);
+	spin_lock_bh(&req_q->lock);
 	return -EIO;
 }
 
@@ -870,14 +870,14 @@ int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
 	volatile struct qdio_buffer_element *sbale;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 				  ZFCP_REQ_NO_QTCB,
 				  adapter->pool.fsf_req_status_read);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -910,7 +910,7 @@ failed_buf:
 	zfcp_fsf_req_free(req);
 	zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -988,7 +988,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
 				  req_flags, adapter->pool.fsf_req_abort);
-	if (unlikely(IS_ERR(req)))
+	if (IS_ERR(req))
 		goto out;
 
 	if (unlikely(!(atomic_read(&unit->status) &
@@ -1106,13 +1106,13 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
 	struct zfcp_fsf_req *req;
 	int ret = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
 				  ZFCP_REQ_AUTO_CLEANUP, pool);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
 		goto out;
 	}
@@ -1148,7 +1148,7 @@ failed_send:
 	if (erp_action)
 		erp_action->fsf_req = NULL;
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return ret;
 }
 
@@ -1223,7 +1223,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els)
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
 				  ZFCP_REQ_AUTO_CLEANUP, NULL);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
 		goto out;
 	}
@@ -1263,14 +1263,14 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
 	struct zfcp_adapter *adapter = erp_action->adapter;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (!atomic_read(&adapter->req_q.count))
 		goto out;
 	req = zfcp_fsf_req_create(adapter,
 				  FSF_QTCB_EXCHANGE_CONFIG_DATA,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1295,7 +1295,7 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1306,13 +1306,13 @@ int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
 	struct zfcp_fsf_req *req = NULL;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
 				  0, NULL);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1334,7 +1334,7 @@ int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	if (!retval)
 		wait_event(req->completion_wq,
 			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
@@ -1359,13 +1359,13 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
 	if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
 		return -EOPNOTSUPP;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (!atomic_read(&adapter->req_q.count))
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1385,7 +1385,7 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1405,13 +1405,13 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
 	if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
 		return -EOPNOTSUPP;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (!atomic_read(&adapter->req_q.count))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
 				  NULL);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1427,7 +1427,7 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	if (!retval)
 		wait_event(req->completion_wq,
 			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
@@ -1531,7 +1531,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
@@ -1539,7 +1539,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
 				  FSF_QTCB_OPEN_PORT_WITH_DID,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1562,7 +1562,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1603,14 +1603,14 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1633,7 +1633,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1700,14 +1700,14 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1731,7 +1731,7 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1875,14 +1875,14 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1910,7 +1910,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1965,13 +1965,13 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1995,7 +1995,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -2228,7 +2228,7 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
 				  adapter->pool.fsf_req_scsi);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -2351,7 +2351,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
 				  adapter->pool.fsf_req_scsi);
-	if (unlikely(IS_ERR(req)))
+	if (IS_ERR(req))
 		goto out;
 
 	req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
@@ -2417,12 +2417,12 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
 		return ERR_PTR(-EINVAL);
 	}
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = -EPERM;
 		goto out;
 	}
@@ -2447,7 +2447,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 
 	if (!retval) {
 		wait_event(req->completion_wq,
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index d6dbd653fde9..69d632d851d9 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -423,9 +423,9 @@ void zfcp_qdio_close(struct zfcp_adapter *adapter)
 
 	/* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */
 	req_q = &adapter->req_q;
-	spin_lock(&req_q->lock);
+	spin_lock_bh(&req_q->lock);
 	atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
-	spin_unlock(&req_q->lock);
+	spin_unlock_bh(&req_q->lock);
 
 	qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);