ibmvnic: Remove code to request error information

When backing device firmware reports an error, it provides an
error ID, which is meant to be queried for more detailed error
information. Currently, however, an error ID is not provided by
the Virtual I/O server and there are not any plans to do so. For
now, it is always unfilled or zero, so request_error_information
will never be called.  Remove it.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 143 deletions

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index ffe7acbeaa22..109e4a58efad 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -718,23 +718,6 @@ static int init_tx_pools(struct net_device *netdev)
 	return 0;
 }
 
-static void release_error_buffers(struct ibmvnic_adapter *adapter)
-{
-	struct device *dev = &adapter->vdev->dev;
-	struct ibmvnic_error_buff *error_buff, *tmp;
-	unsigned long flags;
-
-	spin_lock_irqsave(&adapter->error_list_lock, flags);
-	list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
-		list_del(&error_buff->list);
-		dma_unmap_single(dev, error_buff->dma, error_buff->len,
-				 DMA_FROM_DEVICE);
-		kfree(error_buff->buff);
-		kfree(error_buff);
-	}
-	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
-}
-
 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 {
 	int i;
@@ -896,7 +879,6 @@ static void release_resources(struct ibmvnic_adapter *adapter)
 	release_tx_pools(adapter);
 	release_rx_pools(adapter);
 
-	release_error_buffers(adapter);
 	release_napi(adapter);
 	release_login_rsp_buffer(adapter);
 }
@@ -3843,133 +3825,16 @@ static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
 	ibmvnic_send_crq(adapter, &crq);
 }
 
-static void handle_error_info_rsp(union ibmvnic_crq *crq,
-				  struct ibmvnic_adapter *adapter)
-{
-	struct device *dev = &adapter->vdev->dev;
-	struct ibmvnic_error_buff *error_buff, *tmp;
-	unsigned long flags;
-	bool found = false;
-	int i;
-
-	if (!crq->request_error_rsp.rc.code) {
-		dev_info(dev, "Request Error Rsp returned with rc=%x\n",
-			 crq->request_error_rsp.rc.code);
-		return;
-	}
-
-	spin_lock_irqsave(&adapter->error_list_lock, flags);
-	list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
-		if (error_buff->error_id == crq->request_error_rsp.error_id) {
-			found = true;
-			list_del(&error_buff->list);
-			break;
-		}
-	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
-
-	if (!found) {
-		dev_err(dev, "Couldn't find error id %x\n",
-			be32_to_cpu(crq->request_error_rsp.error_id));
-		return;
-	}
-
-	dev_err(dev, "Detailed info for error id %x:",
-		be32_to_cpu(crq->request_error_rsp.error_id));
-
-	for (i = 0; i < error_buff->len; i++) {
-		pr_cont("%02x", (int)error_buff->buff[i]);
-		if (i % 8 == 7)
-			pr_cont(" ");
-	}
-	pr_cont("\n");
-
-	dma_unmap_single(dev, error_buff->dma, error_buff->len,
-			 DMA_FROM_DEVICE);
-	kfree(error_buff->buff);
-	kfree(error_buff);
-}
-
-static void request_error_information(struct ibmvnic_adapter *adapter,
-				      union ibmvnic_crq *err_crq)
-{
-	struct device *dev = &adapter->vdev->dev;
-	struct net_device *netdev = adapter->netdev;
-	struct ibmvnic_error_buff *error_buff;
-	unsigned long timeout = msecs_to_jiffies(30000);
-	union ibmvnic_crq crq;
-	unsigned long flags;
-	int rc, detail_len;
-
-	error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
-	if (!error_buff)
-		return;
-
-	detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
-	error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
-	if (!error_buff->buff) {
-		kfree(error_buff);
-		return;
-	}
-
-	error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
-					 DMA_FROM_DEVICE);
-	if (dma_mapping_error(dev, error_buff->dma)) {
-		netdev_err(netdev, "Couldn't map error buffer\n");
-		kfree(error_buff->buff);
-		kfree(error_buff);
-		return;
-	}
-
-	error_buff->len = detail_len;
-	error_buff->error_id = err_crq->error_indication.error_id;
-
-	spin_lock_irqsave(&adapter->error_list_lock, flags);
-	list_add_tail(&error_buff->list, &adapter->errors);
-	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
-
-	memset(&crq, 0, sizeof(crq));
-	crq.request_error_info.first = IBMVNIC_CRQ_CMD;
-	crq.request_error_info.cmd = REQUEST_ERROR_INFO;
-	crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
-	crq.request_error_info.len = cpu_to_be32(detail_len);
-	crq.request_error_info.error_id = err_crq->error_indication.error_id;
-
-	rc = ibmvnic_send_crq(adapter, &crq);
-	if (rc) {
-		netdev_err(netdev, "failed to request error information\n");
-		goto err_info_fail;
-	}
-
-	if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
-		netdev_err(netdev, "timeout waiting for error information\n");
-		goto err_info_fail;
-	}
-
-	return;
-
-err_info_fail:
-	spin_lock_irqsave(&adapter->error_list_lock, flags);
-	list_del(&error_buff->list);
-	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
-
-	kfree(error_buff->buff);
-	kfree(error_buff);
-}
-
 static void handle_error_indication(union ibmvnic_crq *crq,
 				    struct ibmvnic_adapter *adapter)
 {
 	struct device *dev = &adapter->vdev->dev;
 
-	dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
+	dev_err(dev, "Firmware reports %serror, cause %d\n",
 		crq->error_indication.flags
 			& IBMVNIC_FATAL_ERROR ? "FATAL " : "",
-		be32_to_cpu(crq->error_indication.error_id),
 		be16_to_cpu(crq->error_indication.error_cause));
 
-	if (be32_to_cpu(crq->error_indication.error_id))
-		request_error_information(adapter, crq);
-
 	if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
 		ibmvnic_reset(adapter, VNIC_RESET_FATAL);
 	else
@@ -4468,10 +4333,6 @@ static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
 		netdev_dbg(netdev, "Got Error Indication\n");
 		handle_error_indication(crq, adapter);
 		break;
-	case REQUEST_ERROR_RSP:
-		netdev_dbg(netdev, "Got Error Detail Response\n");
-		handle_error_info_rsp(crq, adapter);
-		break;
 	case REQUEST_STATISTICS_RSP:
 		netdev_dbg(netdev, "Got Statistics Response\n");
 		complete(&adapter->stats_done);
@@ -4830,9 +4691,6 @@ static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
 
 	spin_lock_init(&adapter->stats_lock);
 
-	INIT_LIST_HEAD(&adapter->errors);
-	spin_lock_init(&adapter->error_list_lock);
-
 	INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
 	INIT_LIST_HEAD(&adapter->rwi_list);
 	mutex_init(&adapter->reset_lock);