2012-05-24 12:32:39

by Felix Fietkau

[permalink] [raw]
Subject: [PATCH 3.5 1/4] ath9k: stop rx dma before stopping tx

It has been found that active Rx can interfere with stopping tx DMA, which
could result in at least parts of those "Failed to stop Tx DMA!" messages.
Stopping rx before tx should prevent that.

Signed-off-by: Felix Fietkau <[email protected]>
---
drivers/net/wireless/ath/ath9k/main.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index dfa78e8..4de4473 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -239,7 +239,7 @@ static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
- bool ret;
+ bool ret = true;

ieee80211_stop_queues(sc->hw);

@@ -250,11 +250,12 @@ static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
ath9k_debug_samp_bb_mac(sc);
ath9k_hw_disable_interrupts(ah);

- ret = ath_drain_all_txq(sc, retry_tx);
-
if (!ath_stoprecv(sc))
ret = false;

+ if (!ath_drain_all_txq(sc, retry_tx))
+ ret = false;
+
if (!flush) {
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_rx_tasklet(sc, 1, true);
--
1.7.3.2



2012-05-24 12:32:39

by Felix Fietkau

[permalink] [raw]
Subject: [PATCH 3.5 4/4] ath9k_hw: apply internal regulator settings on AR933x

On AR933x, the internal regulator settings need to be applied before the
PLL init to avoid stability issues.

Signed-off-by: Felix Fietkau <[email protected]>
---
drivers/net/wireless/ath/ath9k/ar9003_eeprom.c | 2 +-
drivers/net/wireless/ath/ath9k/ar9003_eeprom.h | 3 +++
drivers/net/wireless/ath/ath9k/hw.c | 3 +++
3 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
index ac53d90..dfb0441 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -3809,7 +3809,7 @@ static bool is_pmu_set(struct ath_hw *ah, u32 pmu_reg, int pmu_set)
return true;
}

-static void ar9003_hw_internal_regulator_apply(struct ath_hw *ah)
+void ar9003_hw_internal_regulator_apply(struct ath_hw *ah)
{
int internal_regulator =
ath9k_hw_ar9300_get_eeprom(ah, EEP_INTERNAL_REGULATOR);
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
index 2505ac4..8396d15 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
@@ -334,4 +334,7 @@ u8 *ar9003_get_spur_chan_ptr(struct ath_hw *ah, bool is_2ghz);

unsigned int ar9003_get_paprd_scale_factor(struct ath_hw *ah,
struct ath9k_channel *chan);
+
+void ar9003_hw_internal_regulator_apply(struct ath_hw *ah);
+
#endif
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index abe05ec..7db1890 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1468,6 +1468,9 @@ static bool ath9k_hw_chip_reset(struct ath_hw *ah,
return false;

ah->chip_fullsleep = false;
+
+ if (AR_SREV_9330(ah))
+ ar9003_hw_internal_regulator_apply(ah);
ath9k_hw_init_pll(ah, chan);
ath9k_hw_set_rfmode(ah, chan);

--
1.7.3.2


2012-05-25 17:02:46

by John W. Linville

[permalink] [raw]
Subject: Re: [PATCH 3.5 3/4] ath9k_hw: update AR933x initvals to fix issues with high power devices

On Thu, May 24, 2012 at 02:32:21PM +0200, Felix Fietkau wrote:
> Signed-off-by: Felix Fietkau <[email protected]>

Can you provide more information about the issues with high power devices?

John

--
John W. Linville Someday the world will need a hero, and you
[email protected] might be all we have. Be ready.

2012-05-27 18:10:17

by Felix Fietkau

[permalink] [raw]
Subject: Re: [PATCH 3.5 3/4] ath9k_hw: update AR933x initvals to fix issues with high power devices

On 2012-05-25 5:08 PM, John W. Linville wrote:
> On Thu, May 24, 2012 at 02:32:21PM +0200, Felix Fietkau wrote:
>> Signed-off-by: Felix Fietkau <[email protected]>
>
> Can you provide more information about the issues with high power devices?
Tx being flakey and Rx not working at all.

- Felix

2012-05-24 12:32:39

by Felix Fietkau

[permalink] [raw]
Subject: [PATCH 3.5 3/4] ath9k_hw: update AR933x initvals to fix issues with high power devices

Signed-off-by: Felix Fietkau <[email protected]>
---
.../net/wireless/ath/ath9k/ar9330_1p1_initvals.h | 178 ++++++++++----------
1 files changed, 90 insertions(+), 88 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ar9330_1p1_initvals.h b/drivers/net/wireless/ath/ath9k/ar9330_1p1_initvals.h
index f11d9b2..1bd3a3d 100644
--- a/drivers/net/wireless/ath/ath9k/ar9330_1p1_initvals.h
+++ b/drivers/net/wireless/ath/ath9k/ar9330_1p1_initvals.h
@@ -1,5 +1,6 @@
/*
- * Copyright (c) 2011 Atheros Communications Inc.
+ * Copyright (c) 2010-2011 Atheros Communications Inc.
+ * Copyright (c) 2011-2012 Qualcomm Atheros Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -18,7 +19,7 @@
#define INITVALS_9330_1P1_H

static const u32 ar9331_1p1_baseband_postamble[][5] = {
- /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
+ /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
{0x00009810, 0xd00a8005, 0xd00a8005, 0xd00a8005, 0xd00a8005},
{0x00009820, 0x206a002e, 0x206a002e, 0x206a002e, 0x206a002e},
{0x00009824, 0x5ac640d0, 0x5ac640d0, 0x5ac640d0, 0x5ac640d0},
@@ -27,10 +28,10 @@ static const u32 ar9331_1p1_baseband_postamble[][5] = {
{0x00009830, 0x0000059c, 0x0000059c, 0x0000059c, 0x0000059c},
{0x00009c00, 0x00000044, 0x00000044, 0x00000044, 0x00000044},
{0x00009e00, 0x0372161e, 0x0372161e, 0x037216a4, 0x037216a4},
- {0x00009e04, 0x00182020, 0x00182020, 0x00182020, 0x00182020},
+ {0x00009e04, 0x00202020, 0x00202020, 0x00202020, 0x00202020},
{0x00009e0c, 0x6c4000e2, 0x6d4000e2, 0x6d4000e2, 0x6c4000e2},
{0x00009e10, 0x7ec80d2e, 0x7ec80d2e, 0x7ec80d2e, 0x7ec80d2e},
- {0x00009e14, 0x31395d5e, 0x3139605e, 0x3139605e, 0x31395d5e},
+ {0x00009e14, 0x31365d5e, 0x3136605e, 0x3136605e, 0x31365d5e},
{0x00009e18, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
{0x00009e1c, 0x0001cf9c, 0x0001cf9c, 0x00021f9c, 0x00021f9c},
{0x00009e20, 0x000003b5, 0x000003b5, 0x000003ce, 0x000003ce},
@@ -55,7 +56,7 @@ static const u32 ar9331_1p1_baseband_postamble[][5] = {
{0x0000a288, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
{0x0000a28c, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
{0x0000a2c4, 0x00158d18, 0x00158d18, 0x00158d18, 0x00158d18},
- {0x0000a2d0, 0x00071981, 0x00071981, 0x00071981, 0x00071981},
+ {0x0000a2d0, 0x00071982, 0x00071982, 0x00071982, 0x00071982},
{0x0000a2d8, 0xf999a83a, 0xf999a83a, 0xf999a83a, 0xf999a83a},
{0x0000a358, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
{0x0000ae04, 0x00802020, 0x00802020, 0x00802020, 0x00802020},
@@ -63,7 +64,7 @@ static const u32 ar9331_1p1_baseband_postamble[][5] = {
};

static const u32 ar9331_modes_lowest_ob_db_tx_gain_1p1[][5] = {
- /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
+ /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
{0x0000a2d8, 0x7999a83a, 0x7999a83a, 0x7999a83a, 0x7999a83a},
{0x0000a2dc, 0xffff2a52, 0xffff2a52, 0xffff2a52, 0xffff2a52},
{0x0000a2e0, 0xffffcc84, 0xffffcc84, 0xffffcc84, 0xffffcc84},
@@ -155,7 +156,7 @@ static const u32 ar9331_modes_lowest_ob_db_tx_gain_1p1[][5] = {
};

static const u32 ar9331_modes_high_ob_db_tx_gain_1p1[][5] = {
- /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
+ /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
{0x0000a2d8, 0x7999a83a, 0x7999a83a, 0x7999a83a, 0x7999a83a},
{0x0000a2dc, 0xffaa9a52, 0xffaa9a52, 0xffaa9a52, 0xffaa9a52},
{0x0000a2e0, 0xffb31c84, 0xffb31c84, 0xffb31c84, 0xffb31c84},
@@ -245,7 +246,7 @@ static const u32 ar9331_modes_high_ob_db_tx_gain_1p1[][5] = {
};

static const u32 ar9331_modes_low_ob_db_tx_gain_1p1[][5] = {
- /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
+ /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
{0x0000a2d8, 0x7999a83a, 0x7999a83a, 0x7999a83a, 0x7999a83a},
{0x0000a2dc, 0xffff2a52, 0xffff2a52, 0xffff2a52, 0xffff2a52},
{0x0000a2e0, 0xffffcc84, 0xffffcc84, 0xffffcc84, 0xffffcc84},
@@ -377,14 +378,14 @@ static const u32 ar9331_1p1_radio_core[][2] = {
{0x000160b4, 0x92480040},
{0x000160c0, 0x006db6db},
{0x000160c4, 0x0186db60},
- {0x000160c8, 0x6db6db6c},
+ {0x000160c8, 0x6db4db6c},
{0x000160cc, 0x6de6c300},
{0x000160d0, 0x14500820},
{0x00016100, 0x04cb0001},
{0x00016104, 0xfff80015},
{0x00016108, 0x00080010},
{0x0001610c, 0x00170000},
- {0x00016140, 0x10804000},
+ {0x00016140, 0x10800000},
{0x00016144, 0x01884080},
{0x00016148, 0x000080c0},
{0x00016280, 0x01000015},
@@ -417,7 +418,7 @@ static const u32 ar9331_1p1_radio_core[][2] = {
};

static const u32 ar9331_1p1_soc_postamble[][5] = {
- /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
+ /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
{0x00007010, 0x00000022, 0x00000022, 0x00000022, 0x00000022},
};

@@ -691,7 +692,7 @@ static const u32 ar9331_1p1_baseband_core[][2] = {
};

static const u32 ar9331_modes_high_power_tx_gain_1p1[][5] = {
- /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
+ /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
{0x0000a2d8, 0x7999a83a, 0x7999a83a, 0x7999a83a, 0x7999a83a},
{0x0000a2dc, 0xffff2a52, 0xffff2a52, 0xffff2a52, 0xffff2a52},
{0x0000a2e0, 0xffffcc84, 0xffffcc84, 0xffffcc84, 0xffffcc84},
@@ -783,7 +784,7 @@ static const u32 ar9331_modes_high_power_tx_gain_1p1[][5] = {
};

static const u32 ar9331_1p1_mac_postamble[][5] = {
- /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
+ /* Addr 5G_HT20 5G_HT40 2G_HT40 2G_HT20 */
{0x00001030, 0x00000230, 0x00000460, 0x000002c0, 0x00000160},
{0x00001070, 0x00000168, 0x000002d0, 0x00000318, 0x0000018c},
{0x000010b0, 0x00000e60, 0x00001cc0, 0x00007c70, 0x00003e38},
@@ -973,26 +974,27 @@ static const u32 ar9331_1p1_mac_core[][2] = {

static const u32 ar9331_common_rx_gain_1p1[][2] = {
/* Addr allmodes */
- {0x0000a000, 0x00010000},
- {0x0000a004, 0x00030002},
- {0x0000a008, 0x00050004},
- {0x0000a00c, 0x00810080},
- {0x0000a010, 0x00830082},
- {0x0000a014, 0x01810180},
- {0x0000a018, 0x01830182},
- {0x0000a01c, 0x01850184},
- {0x0000a020, 0x01890188},
- {0x0000a024, 0x018b018a},
- {0x0000a028, 0x018d018c},
- {0x0000a02c, 0x01910190},
- {0x0000a030, 0x01930192},
- {0x0000a034, 0x01950194},
- {0x0000a038, 0x038a0196},
- {0x0000a03c, 0x038c038b},
- {0x0000a040, 0x0390038d},
- {0x0000a044, 0x03920391},
- {0x0000a048, 0x03940393},
- {0x0000a04c, 0x03960395},
+ {0x00009e18, 0x05000000},
+ {0x0000a000, 0x00060005},
+ {0x0000a004, 0x00810080},
+ {0x0000a008, 0x00830082},
+ {0x0000a00c, 0x00850084},
+ {0x0000a010, 0x01820181},
+ {0x0000a014, 0x01840183},
+ {0x0000a018, 0x01880185},
+ {0x0000a01c, 0x018a0189},
+ {0x0000a020, 0x02850284},
+ {0x0000a024, 0x02890288},
+ {0x0000a028, 0x028b028a},
+ {0x0000a02c, 0x03850384},
+ {0x0000a030, 0x03890388},
+ {0x0000a034, 0x038b038a},
+ {0x0000a038, 0x038d038c},
+ {0x0000a03c, 0x03910390},
+ {0x0000a040, 0x03930392},
+ {0x0000a044, 0x03950394},
+ {0x0000a048, 0x00000396},
+ {0x0000a04c, 0x00000000},
{0x0000a050, 0x00000000},
{0x0000a054, 0x00000000},
{0x0000a058, 0x00000000},
@@ -1005,15 +1007,15 @@ static const u32 ar9331_common_rx_gain_1p1[][2] = {
{0x0000a074, 0x00000000},
{0x0000a078, 0x00000000},
{0x0000a07c, 0x00000000},
- {0x0000a080, 0x22222229},
- {0x0000a084, 0x1d1d1d1d},
- {0x0000a088, 0x1d1d1d1d},
- {0x0000a08c, 0x1d1d1d1d},
- {0x0000a090, 0x171d1d1d},
- {0x0000a094, 0x11111717},
- {0x0000a098, 0x00030311},
- {0x0000a09c, 0x00000000},
- {0x0000a0a0, 0x00000000},
+ {0x0000a080, 0x28282828},
+ {0x0000a084, 0x28282828},
+ {0x0000a088, 0x28282828},
+ {0x0000a08c, 0x28282828},
+ {0x0000a090, 0x28282828},
+ {0x0000a094, 0x24242428},
+ {0x0000a098, 0x171e1e1e},
+ {0x0000a09c, 0x02020b0b},
+ {0x0000a0a0, 0x02020202},
{0x0000a0a4, 0x00000000},
{0x0000a0a8, 0x00000000},
{0x0000a0ac, 0x00000000},
@@ -1021,27 +1023,27 @@ static const u32 ar9331_common_rx_gain_1p1[][2] = {
{0x0000a0b4, 0x00000000},
{0x0000a0b8, 0x00000000},
{0x0000a0bc, 0x00000000},
- {0x0000a0c0, 0x001f0000},
- {0x0000a0c4, 0x01000101},
- {0x0000a0c8, 0x011e011f},
- {0x0000a0cc, 0x011c011d},
- {0x0000a0d0, 0x02030204},
- {0x0000a0d4, 0x02010202},
- {0x0000a0d8, 0x021f0200},
- {0x0000a0dc, 0x0302021e},
- {0x0000a0e0, 0x03000301},
- {0x0000a0e4, 0x031e031f},
- {0x0000a0e8, 0x0402031d},
- {0x0000a0ec, 0x04000401},
- {0x0000a0f0, 0x041e041f},
- {0x0000a0f4, 0x0502041d},
- {0x0000a0f8, 0x05000501},
- {0x0000a0fc, 0x051e051f},
- {0x0000a100, 0x06010602},
- {0x0000a104, 0x061f0600},
- {0x0000a108, 0x061d061e},
- {0x0000a10c, 0x07020703},
- {0x0000a110, 0x07000701},
+ {0x0000a0c0, 0x22072208},
+ {0x0000a0c4, 0x22052206},
+ {0x0000a0c8, 0x22032204},
+ {0x0000a0cc, 0x22012202},
+ {0x0000a0d0, 0x221f2200},
+ {0x0000a0d4, 0x221d221e},
+ {0x0000a0d8, 0x33023303},
+ {0x0000a0dc, 0x33003301},
+ {0x0000a0e0, 0x331e331f},
+ {0x0000a0e4, 0x4402331d},
+ {0x0000a0e8, 0x44004401},
+ {0x0000a0ec, 0x441e441f},
+ {0x0000a0f0, 0x55025503},
+ {0x0000a0f4, 0x55005501},
+ {0x0000a0f8, 0x551e551f},
+ {0x0000a0fc, 0x6602551d},
+ {0x0000a100, 0x66006601},
+ {0x0000a104, 0x661e661f},
+ {0x0000a108, 0x7703661d},
+ {0x0000a10c, 0x77017702},
+ {0x0000a110, 0x00007700},
{0x0000a114, 0x00000000},
{0x0000a118, 0x00000000},
{0x0000a11c, 0x00000000},
@@ -1054,26 +1056,26 @@ static const u32 ar9331_common_rx_gain_1p1[][2] = {
{0x0000a138, 0x00000000},
{0x0000a13c, 0x00000000},
{0x0000a140, 0x001f0000},
- {0x0000a144, 0x01000101},
- {0x0000a148, 0x011e011f},
- {0x0000a14c, 0x011c011d},
- {0x0000a150, 0x02030204},
- {0x0000a154, 0x02010202},
- {0x0000a158, 0x021f0200},
- {0x0000a15c, 0x0302021e},
- {0x0000a160, 0x03000301},
- {0x0000a164, 0x031e031f},
- {0x0000a168, 0x0402031d},
- {0x0000a16c, 0x04000401},
- {0x0000a170, 0x041e041f},
- {0x0000a174, 0x0502041d},
- {0x0000a178, 0x05000501},
- {0x0000a17c, 0x051e051f},
- {0x0000a180, 0x06010602},
- {0x0000a184, 0x061f0600},
- {0x0000a188, 0x061d061e},
- {0x0000a18c, 0x07020703},
- {0x0000a190, 0x07000701},
+ {0x0000a144, 0x111f1100},
+ {0x0000a148, 0x111d111e},
+ {0x0000a14c, 0x111b111c},
+ {0x0000a150, 0x22032204},
+ {0x0000a154, 0x22012202},
+ {0x0000a158, 0x221f2200},
+ {0x0000a15c, 0x221d221e},
+ {0x0000a160, 0x33013302},
+ {0x0000a164, 0x331f3300},
+ {0x0000a168, 0x4402331e},
+ {0x0000a16c, 0x44004401},
+ {0x0000a170, 0x441e441f},
+ {0x0000a174, 0x55015502},
+ {0x0000a178, 0x551f5500},
+ {0x0000a17c, 0x6602551e},
+ {0x0000a180, 0x66006601},
+ {0x0000a184, 0x661e661f},
+ {0x0000a188, 0x7703661d},
+ {0x0000a18c, 0x77017702},
+ {0x0000a190, 0x00007700},
{0x0000a194, 0x00000000},
{0x0000a198, 0x00000000},
{0x0000a19c, 0x00000000},
@@ -1100,14 +1102,14 @@ static const u32 ar9331_common_rx_gain_1p1[][2] = {
{0x0000a1f0, 0x00000396},
{0x0000a1f4, 0x00000396},
{0x0000a1f8, 0x00000396},
- {0x0000a1fc, 0x00000196},
+ {0x0000a1fc, 0x00000296},
};

static const u32 ar9331_common_tx_gain_offset1_1[][1] = {
- {0},
- {3},
- {0},
- {0},
+ {0x00000000},
+ {0x00000003},
+ {0x00000000},
+ {0x00000000},
};

static const u32 ar9331_1p1_chansel_xtal_25M[] = {
--
1.7.3.2


2012-05-24 12:32:41

by Felix Fietkau

[permalink] [raw]
Subject: [PATCH 3.5 2/4] ath9k: fix a use-after-free-bug when ath_tx_setup_buffer() fails

ath_tx_setup_buffer() can fail if there is no ath_buf left, or if mapping DMA
failed. In this case it frees the skb passed to it.
If ath_tx_setup_buffer is called from ath_tx_form_aggr, the skb is still
linked into the tid buffer list and must be dequeued before being released.

Signed-off-by: Felix Fietkau <[email protected]>
Cc: [email protected]
---
drivers/net/wireless/ath/ath9k/xmit.c | 16 ++++++++++------
1 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 23eaa1b..d59dd01 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -64,7 +64,8 @@ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc,
struct ath_txq *txq,
struct ath_atx_tid *tid,
- struct sk_buff *skb);
+ struct sk_buff *skb,
+ bool dequeue);

enum {
MCS_HT20,
@@ -811,7 +812,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
fi = get_frame_info(skb);
bf = fi->bf;
if (!fi->bf)
- bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+ bf = ath_tx_setup_buffer(sc, txq, tid, skb, true);

if (!bf)
continue;
@@ -1726,7 +1727,7 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
return;
}

- bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb);
+ bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb, false);
if (!bf)
return;

@@ -1753,7 +1754,7 @@ static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,

bf = fi->bf;
if (!bf)
- bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+ bf = ath_tx_setup_buffer(sc, txq, tid, skb, false);

if (!bf)
return;
@@ -1814,7 +1815,8 @@ u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate)
static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc,
struct ath_txq *txq,
struct ath_atx_tid *tid,
- struct sk_buff *skb)
+ struct sk_buff *skb,
+ bool dequeue)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_frame_info *fi = get_frame_info(skb);
@@ -1863,6 +1865,8 @@ static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc,
return bf;

error:
+ if (dequeue)
+ __skb_unlink(skb, &tid->buf_q);
dev_kfree_skb_any(skb);
return NULL;
}
@@ -1893,7 +1897,7 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb,
*/
ath_tx_send_ampdu(sc, tid, skb, txctl);
} else {
- bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb);
+ bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb, false);
if (!bf)
return;

--
1.7.3.2