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mac802154: rework sdata state change to running 

This patch reworks the handling for setting the state like mac80211. We
use bit's instead a bool variable. The mutex is not needed because it use
test and set bits which are atomic operations.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2014-10-28 18:21:24 +01:00 committed by Marcel Holtmann
parent a543c5989d
commit 0ea3da64fa
2 changed files with 16 additions and 8 deletions
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12
net/mac802154/ieee802154_i.h
View File

@ -67,6 +67,10 @@ enum {
IEEE802154_RX_MSG = 1,
};
enum ieee802154_sdata_state_bits {
SDATA_STATE_RUNNING,
};
/* Slave interface definition.
*
* Slaves represent typical network interfaces available from userspace.
@ -80,7 +84,7 @@ struct ieee802154_sub_if_data {
struct net_device *dev;
int type;
bool running;
unsigned long state;
spinlock_t mib_lock;
@ -120,6 +124,12 @@ IEEE802154_DEV_TO_SUB_IF(const struct net_device *dev)
return netdev_priv(dev);
}
static inline bool
ieee802154_sdata_running(struct ieee802154_sub_if_data *sdata)
{
return test_bit(SDATA_STATE_RUNNING, &sdata->state);
}
extern struct ieee802154_reduced_mlme_ops mac802154_mlme_reduced;
extern struct ieee802154_mlme_ops mac802154_mlme_wpan;

12
net/mac802154/iface.c
View File

@ -156,7 +156,7 @@ static int mac802154_slave_open(struct net_device *dev)
mutex_lock(&sdata->local->iflist_mtx);
list_for_each_entry(subif, &sdata->local->interfaces, list) {
if (subif != sdata && subif->type == sdata->type &&
subif->running) {
ieee802154_sdata_running(subif)) {
mutex_unlock(&sdata->local->iflist_mtx);
return -EBUSY;
}
@ -164,9 +164,7 @@ static int mac802154_slave_open(struct net_device *dev)
mutex_unlock(&sdata->local->iflist_mtx);
}
mutex_lock(&sdata->local->iflist_mtx);
sdata->running = true;
mutex_unlock(&sdata->local->iflist_mtx);
set_bit(SDATA_STATE_RUNNING, &sdata->state);
if (local->open_count++ == 0) {
res = drv_start(local);
@ -178,6 +176,8 @@ static int mac802154_slave_open(struct net_device *dev)
netif_start_queue(dev);
return 0;
err:
/* might already be clear but that doesn't matter */
clear_bit(SDATA_STATE_RUNNING, &sdata->state);
sdata->local->open_count--;
return res;
@ -253,9 +253,7 @@ static int mac802154_slave_close(struct net_device *dev)
netif_stop_queue(dev);
mutex_lock(&sdata->local->iflist_mtx);
sdata->running = false;
mutex_unlock(&sdata->local->iflist_mtx);
clear_bit(SDATA_STATE_RUNNING, &sdata->state);
if (!--local->open_count)
drv_stop(local);