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iwlegacy: add il_{stop,wake}_queues_by_reason functions

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Add functions that will stop/wake all queues. Make them safe
regarding multiple calls and when some ac are stopped/woke
independently.

Tested-by: Jake Edge <jake@lwn.net>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stanislaw Gruszka 2013-06-12 16:44:48 +02:00 committed by John W. Linville
parent 42ce8943e1
commit c6af8074fd
1 changed files with 22 additions and 0 deletions
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22
drivers/net/wireless/iwlegacy/common.h
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@ -1299,6 +1299,8 @@ struct il_priv {
/* queue refcounts */
#define IL_MAX_HW_QUEUES 32
unsigned long queue_stopped[BITS_TO_LONGS(IL_MAX_HW_QUEUES)];
#define IL_STOP_REASON_PASSIVE 0
unsigned long stop_reason;
/* for each AC */
atomic_t queue_stop_count[4];
@ -2291,6 +2293,26 @@ il_stop_queue(struct il_priv *il, struct il_tx_queue *txq)
_il_stop_queue(il, ac);
}
static inline void
il_wake_queues_by_reason(struct il_priv *il, int reason)
{
u8 ac;
if (test_and_clear_bit(reason, &il->stop_reason))
for (ac = 0; ac < 4; ac++)
_il_wake_queue(il, ac);
}
static inline void
il_stop_queues_by_reason(struct il_priv *il, int reason)
{
u8 ac;
if (!test_and_set_bit(reason, &il->stop_reason))
for (ac = 0; ac < 4; ac++)
_il_stop_queue(il, ac);
}
#ifdef ieee80211_stop_queue
#undef ieee80211_stop_queue
#endif