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68 lines
2.1 KiB
Diff
68 lines
2.1 KiB
Diff
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From 841c7e339c4775f4cc614c92aaea82f70fcafbdb Mon Sep 17 00:00:00 2001
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From: Gabor Juhos <juhosg@openwrt.org>
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Date: Sun, 21 Jun 2009 16:59:53 +0200
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Subject: [PATCH 1/3] ath9k: serialize ath9k_hw_setpower calls
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Because ath9k_setpower is called from various contexts, we have to
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protect it against concurrent calls.
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Changes-licensed-under: ISC
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Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
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---
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drivers/net/wireless/ath/ath9k/ath9k.h | 1 +
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drivers/net/wireless/ath/ath9k/hw.c | 15 ++++++++++++++-
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drivers/net/wireless/ath/ath9k/main.c | 1 +
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3 files changed, 16 insertions(+), 1 deletions(-)
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--- a/drivers/net/wireless/ath/ath9k/ath9k.h
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+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
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@@ -544,6 +544,7 @@ struct ath_softc {
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int irq;
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spinlock_t sc_resetlock;
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spinlock_t sc_serial_rw;
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+ spinlock_t sc_pm_lock;
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struct mutex mutex;
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u8 curbssid[ETH_ALEN];
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--- a/drivers/net/wireless/ath/ath9k/hw.c
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+++ b/drivers/net/wireless/ath/ath9k/hw.c
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@@ -2738,7 +2738,8 @@ static bool ath9k_hw_set_power_awake(str
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return true;
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}
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-bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
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+static bool ath9k_hw_setpower_nolock(struct ath_hw *ah,
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+ enum ath9k_power_mode mode)
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{
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int status = true, setChip = true;
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static const char *modes[] = {
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@@ -2772,6 +2773,18 @@ bool ath9k_hw_setpower(struct ath_hw *ah
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return status;
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}
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+bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
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+{
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+ unsigned long flags;
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+ bool ret;
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+
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+ spin_lock_irqsave(&ah->ah_sc->sc_pm_lock, flags);
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+ ret = ath9k_hw_setpower_nolock(ah, mode);
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+ spin_unlock_irqrestore(&ah->ah_sc->sc_pm_lock, flags);
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+
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+ return ret;
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+}
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+
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/*
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* Helper for ASPM support.
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*
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--- a/drivers/net/wireless/ath/ath9k/main.c
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+++ b/drivers/net/wireless/ath/ath9k/main.c
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@@ -1317,6 +1317,7 @@ static int ath_init(u16 devid, struct at
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spin_lock_init(&sc->wiphy_lock);
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spin_lock_init(&sc->sc_resetlock);
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spin_lock_init(&sc->sc_serial_rw);
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+ spin_lock_init(&sc->sc_pm_lock);
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mutex_init(&sc->mutex);
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tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
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tasklet_init(&sc->bcon_tasklet, ath_beacon_tasklet,
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