Commit bc3c90a2 authored by Ben Hutchings's avatar Ben Hutchings Committed by Jeff Garzik
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sfc: Remove some unreachable error paths



Some functions return an error code which is always 0.  Change their
return types to void and simplify their callers accordingly.
Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent c1e5fcc9
......@@ -282,13 +282,13 @@ static int efx_probe_eventq(struct efx_channel *channel)
}
/* Prepare channel's event queue */
static int efx_init_eventq(struct efx_channel *channel)
static void efx_init_eventq(struct efx_channel *channel)
{
EFX_LOG(channel->efx, "chan %d init event queue\n", channel->channel);
channel->eventq_read_ptr = 0;
return falcon_init_eventq(channel);
falcon_init_eventq(channel);
}
static void efx_fini_eventq(struct efx_channel *channel)
......@@ -354,12 +354,11 @@ static int efx_probe_channel(struct efx_channel *channel)
* to propagate configuration changes (mtu, checksum offload), or
* to clear hardware error conditions
*/
static int efx_init_channels(struct efx_nic *efx)
static void efx_init_channels(struct efx_nic *efx)
{
struct efx_tx_queue *tx_queue;
struct efx_rx_queue *rx_queue;
struct efx_channel *channel;
int rc = 0;
/* Calculate the rx buffer allocation parameters required to
* support the current MTU, including padding for header
......@@ -374,36 +373,20 @@ static int efx_init_channels(struct efx_nic *efx)
efx_for_each_channel(channel, efx) {
EFX_LOG(channel->efx, "init chan %d\n", channel->channel);
rc = efx_init_eventq(channel);
if (rc)
goto err;
efx_init_eventq(channel);
efx_for_each_channel_tx_queue(tx_queue, channel) {
rc = efx_init_tx_queue(tx_queue);
if (rc)
goto err;
}
efx_for_each_channel_tx_queue(tx_queue, channel)
efx_init_tx_queue(tx_queue);
/* The rx buffer allocation strategy is MTU dependent */
efx_rx_strategy(channel);
efx_for_each_channel_rx_queue(rx_queue, channel) {
rc = efx_init_rx_queue(rx_queue);
if (rc)
goto err;
}
efx_for_each_channel_rx_queue(rx_queue, channel)
efx_init_rx_queue(rx_queue);
WARN_ON(channel->rx_pkt != NULL);
efx_rx_strategy(channel);
}
return 0;
err:
EFX_ERR(efx, "failed to initialise channel %d\n",
channel ? channel->channel : -1);
efx_fini_channels(efx);
return rc;
}
/* This enables event queue processing and packet transmission.
......@@ -1121,24 +1104,16 @@ static void efx_remove_all(struct efx_nic *efx)
}
/* A convinience function to safely flush all the queues */
int efx_flush_queues(struct efx_nic *efx)
void efx_flush_queues(struct efx_nic *efx)
{
int rc;
EFX_ASSERT_RESET_SERIALISED(efx);
efx_stop_all(efx);
efx_fini_channels(efx);
rc = efx_init_channels(efx);
if (rc) {
efx_schedule_reset(efx, RESET_TYPE_DISABLE);
return rc;
}
efx_init_channels(efx);
efx_start_all(efx);
return 0;
}
/**************************************************************************
......@@ -1311,7 +1286,6 @@ static int efx_net_open(struct net_device *net_dev)
static int efx_net_stop(struct net_device *net_dev)
{
struct efx_nic *efx = netdev_priv(net_dev);
int rc;
EFX_LOG(efx, "closing %s on CPU %d\n", net_dev->name,
raw_smp_processor_id());
......@@ -1319,9 +1293,7 @@ static int efx_net_stop(struct net_device *net_dev)
/* Stop the device and flush all the channels */
efx_stop_all(efx);
efx_fini_channels(efx);
rc = efx_init_channels(efx);
if (rc)
efx_schedule_reset(efx, RESET_TYPE_DISABLE);
efx_init_channels(efx);
return 0;
}
......@@ -1404,16 +1376,10 @@ static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
efx_fini_channels(efx);
net_dev->mtu = new_mtu;
rc = efx_init_channels(efx);
if (rc)
goto fail;
efx_init_channels(efx);
efx_start_all(efx);
return rc;
fail:
efx_schedule_reset(efx, RESET_TYPE_DISABLE);
return rc;
}
static int efx_set_mac_address(struct net_device *net_dev, void *data)
......@@ -1588,22 +1554,19 @@ static int efx_reset_up(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
int rc;
rc = efx_init_channels(efx);
if (rc)
goto fail1;
efx_init_channels(efx);
/* Restore MAC and PHY settings. */
rc = falcon_xmac_set_settings(efx, ecmd);
if (rc) {
EFX_ERR(efx, "could not restore PHY settings\n");
goto fail2;
goto fail;
}
return 0;
fail2:
fail:
efx_fini_channels(efx);
fail1:
return rc;
}
......@@ -2023,19 +1986,16 @@ static int efx_pci_probe_main(struct efx_nic *efx)
goto fail5;
}
rc = efx_init_channels(efx);
if (rc)
goto fail6;
efx_init_channels(efx);
rc = falcon_init_interrupt(efx);
if (rc)
goto fail7;
goto fail6;
return 0;
fail7:
efx_fini_channels(efx);
fail6:
efx_fini_channels(efx);
efx_fini_port(efx);
fail5:
fail4:
......
......@@ -33,7 +33,7 @@ extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue, int delay);
/* Channels */
extern void efx_process_channel_now(struct efx_channel *channel);
extern int efx_flush_queues(struct efx_nic *efx);
extern void efx_flush_queues(struct efx_nic *efx);
/* Ports */
extern void efx_reconfigure_port(struct efx_nic *efx);
......
......@@ -503,10 +503,10 @@ static void efx_ethtool_self_test(struct net_device *net_dev,
if (offline) {
/* Stop the kernel from sending packets during the test. */
efx_stop_queue(efx);
rc = efx_flush_queues(efx);
if (!rc)
rc = efx_offline_test(efx, &efx_tests,
efx->loopback_modes);
efx_flush_queues(efx);
rc = efx_offline_test(efx, &efx_tests,
efx->loopback_modes);
efx_wake_queue(efx);
}
......
......@@ -242,7 +242,7 @@ static struct i2c_algo_bit_data falcon_i2c_bit_operations = {
* falcon_alloc_special_buffer()) in Falcon's buffer table, allowing
* it to be used for event queues, descriptor rings etc.
*/
static int
static void
falcon_init_special_buffer(struct efx_nic *efx,
struct efx_special_buffer *buffer)
{
......@@ -266,8 +266,6 @@ falcon_init_special_buffer(struct efx_nic *efx,
BUF_OWNER_ID_FBUF, 0);
falcon_write_sram(efx, &buf_desc, index);
}
return 0;
}
/* Unmaps a buffer from Falcon and clears the buffer table entries */
......@@ -449,16 +447,13 @@ int falcon_probe_tx(struct efx_tx_queue *tx_queue)
sizeof(efx_qword_t));
}
int falcon_init_tx(struct efx_tx_queue *tx_queue)
void falcon_init_tx(struct efx_tx_queue *tx_queue)
{
efx_oword_t tx_desc_ptr;
struct efx_nic *efx = tx_queue->efx;
int rc;
/* Pin TX descriptor ring */
rc = falcon_init_special_buffer(efx, &tx_queue->txd);
if (rc)
return rc;
falcon_init_special_buffer(efx, &tx_queue->txd);
/* Push TX descriptor ring to card */
EFX_POPULATE_OWORD_10(tx_desc_ptr,
......@@ -495,8 +490,6 @@ int falcon_init_tx(struct efx_tx_queue *tx_queue)
set_bit_le(tx_queue->queue, (void *)&reg);
falcon_write(efx, &reg, TX_CHKSM_CFG_REG_KER_A1);
}
return 0;
}
static int falcon_flush_tx_queue(struct efx_tx_queue *tx_queue)
......@@ -639,11 +632,10 @@ int falcon_probe_rx(struct efx_rx_queue *rx_queue)
sizeof(efx_qword_t));
}
int falcon_init_rx(struct efx_rx_queue *rx_queue)
void falcon_init_rx(struct efx_rx_queue *rx_queue)
{
efx_oword_t rx_desc_ptr;
struct efx_nic *efx = rx_queue->efx;
int rc;
bool is_b0 = falcon_rev(efx) >= FALCON_REV_B0;
bool iscsi_digest_en = is_b0;
......@@ -652,9 +644,7 @@ int falcon_init_rx(struct efx_rx_queue *rx_queue)
rx_queue->rxd.index + rx_queue->rxd.entries - 1);
/* Pin RX descriptor ring */
rc = falcon_init_special_buffer(efx, &rx_queue->rxd);
if (rc)
return rc;
falcon_init_special_buffer(efx, &rx_queue->rxd);
/* Push RX descriptor ring to card */
EFX_POPULATE_OWORD_10(rx_desc_ptr,
......@@ -671,7 +661,6 @@ int falcon_init_rx(struct efx_rx_queue *rx_queue)
RX_DESCQ_EN, 1);
falcon_write_table(efx, &rx_desc_ptr, efx->type->rxd_ptr_tbl_base,
rx_queue->queue);
return 0;
}
static int falcon_flush_rx_queue(struct efx_rx_queue *rx_queue)
......@@ -1205,20 +1194,17 @@ int falcon_probe_eventq(struct efx_channel *channel)
return falcon_alloc_special_buffer(efx, &channel->eventq, evq_size);
}
int falcon_init_eventq(struct efx_channel *channel)
void falcon_init_eventq(struct efx_channel *channel)
{
efx_oword_t evq_ptr;
struct efx_nic *efx = channel->efx;
int rc;
EFX_LOG(efx, "channel %d event queue in special buffers %d-%d\n",
channel->channel, channel->eventq.index,
channel->eventq.index + channel->eventq.entries - 1);
/* Pin event queue buffer */
rc = falcon_init_special_buffer(efx, &channel->eventq);
if (rc)
return rc;
falcon_init_special_buffer(efx, &channel->eventq);
/* Fill event queue with all ones (i.e. empty events) */
memset(channel->eventq.addr, 0xff, channel->eventq.len);
......@@ -1232,8 +1218,6 @@ int falcon_init_eventq(struct efx_channel *channel)
channel->channel);
falcon_set_int_moderation(channel);
return 0;
}
void falcon_fini_eventq(struct efx_channel *channel)
......
......@@ -40,21 +40,21 @@ extern struct efx_nic_type falcon_b_nic_type;
/* TX data path */
extern int falcon_probe_tx(struct efx_tx_queue *tx_queue);
extern int falcon_init_tx(struct efx_tx_queue *tx_queue);
extern void falcon_init_tx(struct efx_tx_queue *tx_queue);
extern void falcon_fini_tx(struct efx_tx_queue *tx_queue);
extern void falcon_remove_tx(struct efx_tx_queue *tx_queue);
extern void falcon_push_buffers(struct efx_tx_queue *tx_queue);
/* RX data path */
extern int falcon_probe_rx(struct efx_rx_queue *rx_queue);
extern int falcon_init_rx(struct efx_rx_queue *rx_queue);
extern void falcon_init_rx(struct efx_rx_queue *rx_queue);
extern void falcon_fini_rx(struct efx_rx_queue *rx_queue);
extern void falcon_remove_rx(struct efx_rx_queue *rx_queue);
extern void falcon_notify_rx_desc(struct efx_rx_queue *rx_queue);
/* Event data path */
extern int falcon_probe_eventq(struct efx_channel *channel);
extern int falcon_init_eventq(struct efx_channel *channel);
extern void falcon_init_eventq(struct efx_channel *channel);
extern void falcon_fini_eventq(struct efx_channel *channel);
extern void falcon_remove_eventq(struct efx_channel *channel);
extern int falcon_process_eventq(struct efx_channel *channel, int rx_quota);
......
......@@ -800,7 +800,7 @@ int efx_probe_rx_queue(struct efx_rx_queue *rx_queue)
return rc;
}
int efx_init_rx_queue(struct efx_rx_queue *rx_queue)
void efx_init_rx_queue(struct efx_rx_queue *rx_queue)
{
struct efx_nic *efx = rx_queue->efx;
unsigned int max_fill, trigger, limit;
......@@ -824,7 +824,7 @@ int efx_init_rx_queue(struct efx_rx_queue *rx_queue)
rx_queue->fast_fill_limit = limit;
/* Set up RX descriptor ring */
return falcon_init_rx(rx_queue);
falcon_init_rx(rx_queue);
}
void efx_fini_rx_queue(struct efx_rx_queue *rx_queue)
......
......@@ -14,7 +14,7 @@
int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
int efx_init_rx_queue(struct efx_rx_queue *rx_queue);
void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
int efx_lro_init(struct net_lro_mgr *lro_mgr, struct efx_nic *efx);
......
......@@ -443,7 +443,7 @@ int efx_probe_tx_queue(struct efx_tx_queue *tx_queue)
return rc;
}
int efx_init_tx_queue(struct efx_tx_queue *tx_queue)
void efx_init_tx_queue(struct efx_tx_queue *tx_queue)
{
EFX_LOG(tx_queue->efx, "initialising TX queue %d\n", tx_queue->queue);
......@@ -454,7 +454,7 @@ int efx_init_tx_queue(struct efx_tx_queue *tx_queue)
BUG_ON(tx_queue->stopped);
/* Set up TX descriptor ring */
return falcon_init_tx(tx_queue);
falcon_init_tx(tx_queue);
}
void efx_release_tx_buffers(struct efx_tx_queue *tx_queue)
......
......@@ -15,7 +15,7 @@
int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
int efx_init_tx_queue(struct efx_tx_queue *tx_queue);
void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
int efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
......
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