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Code Issues Releases Wiki Activity

s390/qeth: drop redundant state checking

Browse source 
Now that qeth always uses dev_close() to shutdown the interface, we can
trust the locking and remove some custom state checks.
qeth_l?_stop_card() is no longer called for a card in UP state, so remove
the checks there too. This basically makes the UP state obsolete, so rip
out the whole thing (except for the sysfs-visible string).

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2019-02-28 18:59:44 +01:00 committed by David S. Miller
parent 62ca98d475
commit 0f7aedbdf2
5 changed files with 13 additions and 43 deletions
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8
drivers/s390/net/qeth_core.h
View file

@ -483,7 +483,6 @@ struct qeth_out_q_stats {
u64 tx_bytes;
u64 tx_errors;
u64 tx_dropped;
u64 tx_carrier_errors;
};
struct qeth_qdio_out_q {
@ -552,7 +551,6 @@ enum qeth_card_states {
CARD_STATE_DOWN,
CARD_STATE_HARDSETUP,
CARD_STATE_SOFTSETUP,
CARD_STATE_UP,
};
/**
@ -808,6 +806,11 @@ struct qeth_card {
struct work_struct close_dev_work;
};
static inline bool qeth_card_hw_is_reachable(struct qeth_card *card)
{
return card->state == CARD_STATE_SOFTSETUP;
}
struct qeth_trap_id {
__u16 lparnr;
char vmname[8];
@ -942,7 +945,6 @@ extern const struct attribute_group qeth_device_attr_group;
extern const struct attribute_group qeth_device_blkt_group;
extern const struct device_type qeth_generic_devtype;
int qeth_card_hw_is_reachable(struct qeth_card *);
const char *qeth_get_cardname_short(struct qeth_card *);
int qeth_realloc_buffer_pool(struct qeth_card *, int);
int qeth_core_load_discipline(struct qeth_card *, enum qeth_discipline_id);

18
drivers/s390/net/qeth_core_main.c
View file

@ -74,13 +74,6 @@ static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
int qeth_card_hw_is_reachable(struct qeth_card *card)
{
return (card->state == CARD_STATE_SOFTSETUP) ||
(card->state == CARD_STATE_UP);
}
EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
static void qeth_close_dev_handler(struct work_struct *work)
{
struct qeth_card *card;
@ -6206,7 +6199,6 @@ void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
stats->tx_bytes += queue->stats.tx_bytes;
stats->tx_errors += queue->stats.tx_errors;
stats->tx_dropped += queue->stats.tx_dropped;
stats->tx_carrier_errors += queue->stats.tx_carrier_errors;
}
}
EXPORT_SYMBOL_GPL(qeth_get_stats64);
@ -6216,16 +6208,11 @@ int qeth_open(struct net_device *dev)
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT(card, 4, "qethopen");
if (card->state == CARD_STATE_UP)
return 0;
if (card->state != CARD_STATE_SOFTSETUP)
return -ENODEV;
if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
return -EIO;
card->data.state = CH_STATE_UP;
card->state = CARD_STATE_UP;
netif_start_queue(dev);
napi_enable(&card->napi);
@ -6243,10 +6230,7 @@ int qeth_stop(struct net_device *dev)
QETH_CARD_TEXT(card, 4, "qethstop");
netif_tx_disable(dev);
if (card->state == CARD_STATE_UP) {
card->state = CARD_STATE_SOFTSETUP;
napi_disable(&card->napi);
}
napi_disable(&card->napi);
return 0;
}
EXPORT_SYMBOL_GPL(qeth_stop);

8
drivers/s390/net/qeth_core_sys.c
View file

@ -29,11 +29,11 @@ static ssize_t qeth_dev_state_show(struct device *dev,
case CARD_STATE_HARDSETUP:
return sprintf(buf, "HARDSETUP\n");
case CARD_STATE_SOFTSETUP:
if (card->dev->flags & IFF_UP)
return sprintf(buf, "UP (LAN %s)\n",
netif_carrier_ok(card->dev) ? "ONLINE" :
"OFFLINE");
return sprintf(buf, "SOFTSETUP\n");
case CARD_STATE_UP:
return sprintf(buf, "UP (LAN %s)\n",
netif_carrier_ok(card->dev) ? "ONLINE" :
"OFFLINE");
default:
return sprintf(buf, "UNKNOWN\n");
}

11
drivers/s390/net/qeth_l2_main.c
View file

@ -291,10 +291,7 @@ static void qeth_l2_stop_card(struct qeth_card *card)
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
qeth_set_allowed_threads(card, 0, 1);
if (card->read.state == CH_STATE_UP &&
card->write.state == CH_STATE_UP &&
card->state == CARD_STATE_UP)
card->state = CARD_STATE_SOFTSETUP;
if (card->state == CARD_STATE_SOFTSETUP) {
qeth_l2_del_all_macs(card);
qeth_clear_ipacmd_list(card);
@ -614,11 +611,6 @@ static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
queue = qeth_get_tx_queue(card, skb, ipv, cast_type);
if (card->state != CARD_STATE_UP) {
QETH_TXQ_STAT_INC(queue, tx_carrier_errors);
goto tx_drop;
}
netif_stop_queue(dev);
if (IS_OSN(card))
@ -636,7 +628,6 @@ static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
return NETDEV_TX_BUSY;
} /* else fall through */
tx_drop:
QETH_TXQ_STAT_INC(queue, tx_dropped);
QETH_TXQ_STAT_INC(queue, tx_errors);
dev_kfree_skb_any(skb);

11
drivers/s390/net/qeth_l3_main.c
View file

@ -1412,13 +1412,11 @@ static void qeth_l3_stop_card(struct qeth_card *card)
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
qeth_set_allowed_threads(card, 0, 1);
if (card->options.sniffer &&
(card->info.promisc_mode == SET_PROMISC_MODE_ON))
qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
if (card->read.state == CH_STATE_UP &&
card->write.state == CH_STATE_UP &&
card->state == CARD_STATE_UP)
card->state = CARD_STATE_SOFTSETUP;
if (card->state == CARD_STATE_SOFTSETUP) {
qeth_l3_clear_ip_htable(card, 1);
qeth_clear_ipacmd_list(card);
@ -2076,11 +2074,6 @@ static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
goto tx_drop;
}
if (card->state != CARD_STATE_UP) {
QETH_TXQ_STAT_INC(queue, tx_carrier_errors);
goto tx_drop;
}
if (cast_type == RTN_BROADCAST && !card->info.broadcast_capable)
goto tx_drop;