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Commit 713d0394 authored by Sathya Perla's avatar Sathya Perla Committed by David S. Miller
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be2net: remove BUG_ON() when be2net runs out of mccq wrbs 

The driver can run out of mccq wrbs when completions don't arrive
due to an unresponsive card. This must not hit a BUG_ON(); instead
log a msg and return an error.
Signed-off-by: default avatarSathya Perla <sathyap@serverengines.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8d56ff11
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Showing with 85 additions and 4 deletions
drivers/net/benet/be_cmds.c
View file @ 713d0394
......@@ -349,7 +349,11 @@ static struct be_mcc_wrb *wrb_from_mccq(struct be_adapter *adapter)
struct be_queue_info *mccq = &adapter->mcc_obj.q;
struct be_mcc_wrb *wrb;
BUG_ON(atomic_read(&mccq->used) >= mccq->len);
if (atomic_read(&mccq->used) >= mccq->len) {
dev_err(&adapter->pdev->dev, "Out of MCCQ wrbs\n");
return NULL;
}
wrb = queue_head_node(mccq);
queue_head_inc(mccq);
atomic_inc(&mccq->used);
......@@ -499,6 +503,10 @@ int be_cmd_pmac_add(struct be_adapter *adapter, u8 *mac_addr,
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -515,6 +523,7 @@ int be_cmd_pmac_add(struct be_adapter *adapter, u8 *mac_addr,
*pmac_id = le32_to_cpu(resp->pmac_id);
}
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -529,6 +538,10 @@ int be_cmd_pmac_del(struct be_adapter *adapter, u32 if_id, u32 pmac_id)
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -541,8 +554,8 @@ int be_cmd_pmac_del(struct be_adapter *adapter, u32 if_id, u32 pmac_id)
status = be_mcc_notify_wait(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -861,10 +874,15 @@ int be_cmd_get_stats(struct be_adapter *adapter, struct be_dma_mem *nonemb_cmd)
struct be_mcc_wrb *wrb;
struct be_cmd_req_get_stats *req;
struct be_sge *sge;
int status = 0;
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = nonemb_cmd->va;
sge = nonembedded_sgl(wrb);
......@@ -879,8 +897,9 @@ int be_cmd_get_stats(struct be_adapter *adapter, struct be_dma_mem *nonemb_cmd)
be_mcc_notify(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return 0;
return status;
}
/* Uses synchronous mcc */
......@@ -894,6 +913,10 @@ int be_cmd_link_status_query(struct be_adapter *adapter,
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
*link_up = false;
......@@ -913,6 +936,7 @@ int be_cmd_link_status_query(struct be_adapter *adapter,
}
}
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -951,10 +975,15 @@ int be_cmd_modify_eqd(struct be_adapter *adapter, u32 eq_id, u32 eqd)
{
struct be_mcc_wrb *wrb;
struct be_cmd_req_modify_eq_delay *req;
int status = 0;
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -969,8 +998,9 @@ int be_cmd_modify_eqd(struct be_adapter *adapter, u32 eq_id, u32 eqd)
be_mcc_notify(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return 0;
return status;
}
/* Uses sycnhronous mcc */
......@@ -984,6 +1014,10 @@ int be_cmd_vlan_config(struct be_adapter *adapter, u32 if_id, u16 *vtag_array,
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -1002,6 +1036,7 @@ int be_cmd_vlan_config(struct be_adapter *adapter, u32 if_id, u16 *vtag_array,
status = be_mcc_notify_wait(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1018,6 +1053,10 @@ int be_cmd_promiscuous_config(struct be_adapter *adapter, u8 port_num, bool en)
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -1032,6 +1071,7 @@ int be_cmd_promiscuous_config(struct be_adapter *adapter, u8 port_num, bool en)
status = be_mcc_notify_wait(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1052,6 +1092,10 @@ int be_cmd_multicast_set(struct be_adapter *adapter, u32 if_id,
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
sge = nonembedded_sgl(wrb);
memset(req, 0, sizeof(*req));
......@@ -1078,6 +1122,7 @@ int be_cmd_multicast_set(struct be_adapter *adapter, u32 if_id,
status = be_mcc_notify_wait(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1092,6 +1137,10 @@ int be_cmd_set_flow_control(struct be_adapter *adapter, u32 tx_fc, u32 rx_fc)
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -1104,6 +1153,7 @@ int be_cmd_set_flow_control(struct be_adapter *adapter, u32 tx_fc, u32 rx_fc)
status = be_mcc_notify_wait(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1118,6 +1168,10 @@ int be_cmd_get_flow_control(struct be_adapter *adapter, u32 *tx_fc, u32 *rx_fc)
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -1133,6 +1187,7 @@ int be_cmd_get_flow_control(struct be_adapter *adapter, u32 *tx_fc, u32 *rx_fc)
*rx_fc = le16_to_cpu(resp->rx_flow_control);
}
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1199,6 +1254,10 @@ int be_cmd_set_beacon_state(struct be_adapter *adapter, u8 port_num,
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -1213,6 +1272,7 @@ int be_cmd_set_beacon_state(struct be_adapter *adapter, u8 port_num,
status = be_mcc_notify_wait(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1227,6 +1287,10 @@ int be_cmd_get_beacon_state(struct be_adapter *adapter, u8 port_num, u32 *state)
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
......@@ -1243,6 +1307,7 @@ int be_cmd_get_beacon_state(struct be_adapter *adapter, u8 port_num, u32 *state)
*state = resp->beacon_state;
}
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1258,6 +1323,10 @@ int be_cmd_read_port_type(struct be_adapter *adapter, u32 port,
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(struct be_cmd_resp_port_type), true, 0);
......@@ -1273,6 +1342,7 @@ int be_cmd_read_port_type(struct be_adapter *adapter, u32 port,
*connector = resp->data.connector;
}
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1288,6 +1358,11 @@ int be_cmd_write_flashrom(struct be_adapter *adapter, struct be_dma_mem *cmd,
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = cmd->va;
sge = nonembedded_sgl(wrb);
be_wrb_hdr_prepare(wrb, cmd->size, false, 1);
......@@ -1304,6 +1379,7 @@ int be_cmd_write_flashrom(struct be_adapter *adapter, struct be_dma_mem *cmd,
status = be_mcc_notify_wait(adapter);
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
......@@ -1317,6 +1393,10 @@ int be_cmd_get_flash_crc(struct be_adapter *adapter, u8 *flashed_crc)
spin_lock_bh(&adapter->mcc_lock);
wrb = wrb_from_mccq(adapter);
if (!wrb) {
status = -EBUSY;
goto err;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req)+4, true, 0);
......@@ -1333,6 +1413,7 @@ int be_cmd_get_flash_crc(struct be_adapter *adapter, u8 *flashed_crc)
if (!status)
memcpy(flashed_crc, req->params.data_buf, 4);
err:
spin_unlock_bh(&adapter->mcc_lock);
return status;
}
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