From: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
This patch makes sure that valid WOW triggers
are present before trying to suspend the device.
Also, introduce and use ATH_OP_WOW_ENABLED to
bypass PCI suspend and clear it in resume().
Signed-off-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath.h | 1 +
drivers/net/wireless/ath/ath9k/pci.c | 5 +++-
drivers/net/wireless/ath/ath9k/wow.c | 53 ++++++++++++++++--------------------
3 files changed, 29 insertions(+), 30 deletions(-)
diff --git a/drivers/net/wireless/ath/ath.h b/drivers/net/wireless/ath/ath.h
index ccba4fe..1eebe2e 100644
--- a/drivers/net/wireless/ath/ath.h
+++ b/drivers/net/wireless/ath/ath.h
@@ -64,6 +64,7 @@ enum ath_op_flags {
ATH_OP_HW_RESET,
ATH_OP_SCANNING,
ATH_OP_MULTI_CHANNEL,
+ ATH_OP_WOW_ENABLED,
};
enum ath_bus_type {
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index cc5c681..e6fef1b 100644
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -998,9 +998,12 @@ static int ath_pci_suspend(struct device *device)
struct pci_dev *pdev = to_pci_dev(device);
struct ieee80211_hw *hw = pci_get_drvdata(pdev);
struct ath_softc *sc = hw->priv;
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
- if (sc->wow_enabled)
+ if (test_bit(ATH_OP_WOW_ENABLED, &common->op_flags)) {
+ dev_info(&pdev->dev, "WOW is enabled, bypassing PCI suspend\n");
return 0;
+ }
/* The device has to be moved to FULLSLEEP forcibly.
* Otherwise the chip never moved to full sleep,
diff --git a/drivers/net/wireless/ath/ath9k/wow.c b/drivers/net/wireless/ath/ath9k/wow.c
index 8bcbaa9..c0c564d 100644
--- a/drivers/net/wireless/ath/ath9k/wow.c
+++ b/drivers/net/wireless/ath/ath9k/wow.c
@@ -23,21 +23,21 @@ static const struct wiphy_wowlan_support ath9k_wowlan_support = {
.pattern_max_len = MAX_PATTERN_SIZE,
};
-static void ath9k_wow_map_triggers(struct ath_softc *sc,
- struct cfg80211_wowlan *wowlan,
- u32 *wow_triggers)
+static u8 ath9k_wow_map_triggers(struct ath_softc *sc,
+ struct cfg80211_wowlan *wowlan)
{
+ u8 wow_triggers = 0;
+
if (wowlan->disconnect)
- *wow_triggers |= AH_WOW_LINK_CHANGE |
- AH_WOW_BEACON_MISS;
+ wow_triggers |= AH_WOW_LINK_CHANGE |
+ AH_WOW_BEACON_MISS;
if (wowlan->magic_pkt)
- *wow_triggers |= AH_WOW_MAGIC_PATTERN_EN;
+ wow_triggers |= AH_WOW_MAGIC_PATTERN_EN;
if (wowlan->n_patterns)
- *wow_triggers |= AH_WOW_USER_PATTERN_EN;
-
- sc->wow_enabled = *wow_triggers;
+ wow_triggers |= AH_WOW_USER_PATTERN_EN;
+ return wow_triggers;
}
static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
@@ -45,7 +45,7 @@ static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
int pattern_count = 0;
- int i, byte_cnt;
+ int i, byte_cnt = 0;
u8 dis_deauth_pattern[MAX_PATTERN_SIZE];
u8 dis_deauth_mask[MAX_PATTERN_SIZE];
@@ -80,12 +80,7 @@ static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
* | x:x:x:x:x:x -- 22 bytes
*/
- /* Create Disassociate Pattern first */
-
- byte_cnt = 0;
-
/* Fill out the mask with all FF's */
-
for (i = 0; i < MAX_PATTERN_MASK_SIZE; i++)
dis_deauth_mask[i] = 0xff;
@@ -108,17 +103,13 @@ static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
byte_cnt += 6;
/* copy the bssid, its same as the source mac address */
-
memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
/* Create Disassociate pattern mask */
-
dis_deauth_mask[0] = 0xfe;
dis_deauth_mask[1] = 0x03;
dis_deauth_mask[2] = 0xc0;
- ath_dbg(common, WOW, "Adding disassoc/deauth patterns for WoW\n");
-
ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
pattern_count, byte_cnt);
@@ -131,7 +122,6 @@ static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
pattern_count, byte_cnt);
-
}
static void ath9k_wow_add_pattern(struct ath_softc *sc,
@@ -190,7 +180,7 @@ int ath9k_suspend(struct ieee80211_hw *hw,
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
- u32 wow_triggers_enabled = 0;
+ u8 triggers;
int ret = 0;
ath9k_deinit_channel_context(sc);
@@ -230,14 +220,16 @@ int ath9k_suspend(struct ieee80211_hw *hw,
goto fail_wow;
}
+ triggers = ath9k_wow_map_triggers(sc, wowlan);
+ if (!triggers) {
+ ath_dbg(common, WOW, "No valid WoW triggers\n");
+ ret = 1;
+ goto fail_wow;
+ }
+
ath_cancel_work(sc);
ath_stop_ani(sc);
- ath9k_wow_map_triggers(sc, wowlan, &wow_triggers_enabled);
-
- ath_dbg(common, WOW, "WoW triggers enabled 0x%x\n",
- wow_triggers_enabled);
-
ath9k_ps_wakeup(sc);
ath9k_stop_btcoex(sc);
@@ -248,7 +240,7 @@ int ath9k_suspend(struct ieee80211_hw *hw,
*/
ath9k_wow_add_disassoc_deauth_pattern(sc);
- if (wow_triggers_enabled & AH_WOW_USER_PATTERN_EN)
+ if (triggers & AH_WOW_USER_PATTERN_EN)
ath9k_wow_add_pattern(sc, wowlan);
spin_lock_bh(&sc->sc_pcu_lock);
@@ -273,12 +265,13 @@ int ath9k_suspend(struct ieee80211_hw *hw,
synchronize_irq(sc->irq);
tasklet_kill(&sc->intr_tq);
- ath9k_hw_wow_enable(ah, wow_triggers_enabled);
+ ath9k_hw_wow_enable(ah, triggers);
ath9k_ps_restore(sc);
- ath_dbg(common, ANY, "WoW enabled in ath9k\n");
+ ath_dbg(common, WOW, "Suspend with WoW triggers: 0x%x\n", triggers);
atomic_inc(&sc->wow_sleep_proc_intr);
+ set_bit(ATH_OP_WOW_ENABLED, &common->op_flags);
fail_wow:
mutex_unlock(&sc->mutex);
return ret;
@@ -327,6 +320,8 @@ int ath9k_resume(struct ieee80211_hw *hw)
ath_restart_work(sc);
ath9k_start_btcoex(sc);
+ clear_bit(ATH_OP_WOW_ENABLED, &common->op_flags);
+
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
--
2.2.2
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