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ibmvnic: Only retrieve error info if present 

When handling a fatal error in the driver, there can be additional
error information provided by the vios. This information is not
always present, so only retrieve the additional error information
when present.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nathan Fontenot 2017-04-21 15:38:52 -04:00 committed by David S. Miller
parent 6052d5e2a1
commit 2f9de9bac6
1 changed files with 51 additions and 20 deletions
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71
drivers/net/ethernet/ibm/ibmvnic.c
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@ -2361,25 +2361,22 @@ static void handle_error_info_rsp(union ibmvnic_crq *crq,
kfree(error_buff);
}
static void handle_error_indication(union ibmvnic_crq *crq,
struct ibmvnic_adapter *adapter)
static void request_error_information(struct ibmvnic_adapter *adapter,
union ibmvnic_crq *err_crq)
{
int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
struct device *dev = &adapter->vdev->dev;
struct net_device *netdev = adapter->netdev;
struct ibmvnic_error_buff *error_buff;
union ibmvnic_crq new_crq;
unsigned long timeout = msecs_to_jiffies(30000);
union ibmvnic_crq crq;
unsigned long flags;
dev_err(dev, "Firmware reports %serror id %x, 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));
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);
@ -2389,27 +2386,61 @@ static void handle_error_indication(union ibmvnic_crq *crq,
error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
DMA_FROM_DEVICE);
if (dma_mapping_error(dev, error_buff->dma)) {
if (!firmware_has_feature(FW_FEATURE_CMO))
dev_err(dev, "Couldn't map error buffer\n");
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 = crq->error_indication.error_id;
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(&new_crq, 0, sizeof(new_crq));
new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
new_crq.request_error_info.len = cpu_to_be32(detail_len);
new_crq.request_error_info.error_id = crq->error_indication.error_id;
ibmvnic_send_crq(adapter, &new_crq);
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",
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);
}
static void handle_change_mac_rsp(union ibmvnic_crq *crq,