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Code Issues Releases Wiki Activity

s390/qeth: remove duplicated carrier state tracking

Browse source 
The netdevice is always available, apply any carrier state changes to it
without caching them.
On a STARTLAN event (ie. carrier-up), defer updating the state to
qeth_core_hardsetup_card() in the subsequent recovery action.

Also remove the carrier-state checks from the xmit routines. Stopping
transmission on carrier-down is the responsibility of upper-level code
(eg see dev_direct_xmit()).

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 2018-09-26 18:29:16 +02:00 committed by David S. Miller
parent d782d80f36
commit 91cc98f51e
5 changed files with 10 additions and 22 deletions
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1
drivers/s390/net/qeth_core.h
View file

@ -763,7 +763,6 @@ struct qeth_switch_info {
struct qeth_card {
struct list_head list;
enum qeth_card_states state;
int lan_online;
spinlock_t lock;
struct ccwgroup_device *gdev;
struct qeth_channel read;

12
drivers/s390/net/qeth_core_main.c
View file

@ -652,16 +652,13 @@ static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
"The link for interface %s on CHPID 0x%X failed\n",
QETH_CARD_IFNAME(card), card->info.chpid);
qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
}
card->lan_online = 0;
netif_carrier_off(card->dev);
}
return NULL;
case IPA_CMD_STARTLAN:
dev_info(&card->gdev->dev,
"The link for %s on CHPID 0x%X has been restored\n",
QETH_CARD_IFNAME(card), card->info.chpid);
netif_carrier_on(card->dev);
card->lan_online = 1;
if (card->info.hwtrap)
card->info.hwtrap = 2;
qeth_schedule_recovery(card);
@ -5133,13 +5130,14 @@ int qeth_core_hardsetup_card(struct qeth_card *card)
if (rc == IPA_RC_LAN_OFFLINE) {
dev_warn(&card->gdev->dev,
"The LAN is offline\n");
card->lan_online = 0;
netif_carrier_off(card->dev);
} else {
rc = -ENODEV;
goto out;
}
} else
card->lan_online = 1;
} else {
netif_carrier_on(card->dev);
}
card->options.ipa4.supported_funcs = 0;
card->options.ipa6.supported_funcs = 0;

7
drivers/s390/net/qeth_core_sys.c
View file

@ -31,10 +31,9 @@ static ssize_t qeth_dev_state_show(struct device *dev,
case CARD_STATE_SOFTSETUP:
return sprintf(buf, "SOFTSETUP\n");
case CARD_STATE_UP:
if (card->lan_online)
return sprintf(buf, "UP (LAN ONLINE)\n");
else
return sprintf(buf, "UP (LAN OFFLINE)\n");
return sprintf(buf, "UP (LAN %s)\n",
netif_carrier_ok(card->dev) ? "ONLINE" :
"OFFLINE");
case CARD_STATE_RECOVER:
return sprintf(buf, "RECOVER\n");
default:

6
drivers/s390/net/qeth_l2_main.c
View file

@ -694,7 +694,7 @@ static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
int tx_bytes = skb->len;
int rc;
if ((card->state != CARD_STATE_UP) || !card->lan_online) {
if (card->state != CARD_STATE_UP) {
card->stats.tx_carrier_errors++;
goto tx_drop;
}
@ -997,10 +997,6 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
goto out_remove;
}
card->state = CARD_STATE_SOFTSETUP;
if (card->lan_online)
netif_carrier_on(card->dev);
else
netif_carrier_off(card->dev);
qeth_set_allowed_threads(card, 0xffffffff, 0);

6
drivers/s390/net/qeth_l3_main.c
View file

@ -2233,7 +2233,7 @@ static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
goto tx_drop;
}
if (card->state != CARD_STATE_UP || !card->lan_online) {
if (card->state != CARD_STATE_UP) {
card->stats.tx_carrier_errors++;
goto tx_drop;
}
@ -2573,10 +2573,6 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
qeth_set_allowed_threads(card, 0xffffffff, 0);
qeth_l3_recover_ip(card);
if (card->lan_online)
netif_carrier_on(card->dev);
else
netif_carrier_off(card->dev);
qeth_enable_hw_features(card->dev);
if (recover_flag == CARD_STATE_RECOVER) {