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authorJohannes Stezenbach <js@sig21.net>2010-11-30 16:49:23 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-12-20 13:48:04 -0500
commit9f333281a7da4c3a59bccc0cb53f7590eb850d93 (patch)
tree516ce1c2abc5bf4662f484586654589bb23b63c8
parent56e6417b49132d4f56e9f2241d31942b90b46315 (diff)
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mac80211/rt2x00: add ieee80211_tx_status_ni()
All rt2x00 drivers except rt2800pci call ieee80211_tx_status() from a workqueue, which causes "NOHZ: local_softirq_pending 08" messages. To fix it, add ieee80211_tx_status_ni() similar to ieee80211_rx_ni() which can be called from process context, and call it from rt2x00lib_txdone(). For the rt2800pci special case a driver flag is introduced. https://bugzilla.kernel.org/show_bug.cgi?id=24892 Signed-off-by: Johannes Stezenbach <js@sig21.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/rt2x00/rt2800pci.c1
-rw-r--r--drivers/net/wireless/rt2x00/rt2x00.h1
-rw-r--r--drivers/net/wireless/rt2x00/rt2x00dev.c9
-rw-r--r--include/net/mac80211.h28
4 files changed, 32 insertions, 7 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
index b267395..09a6790 100644
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -912,6 +912,7 @@ static int rt2800pci_probe_hw(struct rt2x00_dev *rt2x00dev)
__set_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags);
__set_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags);
__set_bit(DRIVER_REQUIRE_TXSTATUS_FIFO, &rt2x00dev->flags);
+ __set_bit(DRIVER_REQUIRE_TASKLET_CONTEXT, &rt2x00dev->flags);
if (!modparam_nohwcrypt)
__set_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags);
__set_bit(DRIVER_SUPPORT_LINK_TUNING, &rt2x00dev->flags);
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 94fe589..ab43e7c 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -664,6 +664,7 @@ enum rt2x00_flags {
DRIVER_REQUIRE_COPY_IV,
DRIVER_REQUIRE_L2PAD,
DRIVER_REQUIRE_TXSTATUS_FIFO,
+ DRIVER_REQUIRE_TASKLET_CONTEXT,
/*
* Driver features
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index 5ba79b9..d019830 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -390,9 +390,12 @@ void rt2x00lib_txdone(struct queue_entry *entry,
* through a mac80211 library call (RTS/CTS) then we should not
* send the status report back.
*/
- if (!(skbdesc_flags & SKBDESC_NOT_MAC80211))
- ieee80211_tx_status(rt2x00dev->hw, entry->skb);
- else
+ if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) {
+ if (test_bit(DRIVER_REQUIRE_TASKLET_CONTEXT, &rt2x00dev->flags))
+ ieee80211_tx_status(rt2x00dev->hw, entry->skb);
+ else
+ ieee80211_tx_status_ni(rt2x00dev->hw, entry->skb);
+ } else
dev_kfree_skb_any(entry->skb);
/*
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9fdf982..365359b 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2024,8 +2024,8 @@ static inline void ieee80211_rx_ni(struct ieee80211_hw *hw,
*
* This function may not be called in IRQ context. Calls to this function
* for a single hardware must be synchronized against each other. Calls
- * to this function and ieee80211_tx_status_irqsafe() may not be mixed
- * for a single hardware.
+ * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe()
+ * may not be mixed for a single hardware.
*
* @hw: the hardware the frame was transmitted by
* @skb: the frame that was transmitted, owned by mac80211 after this call
@@ -2034,13 +2034,33 @@ void ieee80211_tx_status(struct ieee80211_hw *hw,
struct sk_buff *skb);
/**
+ * ieee80211_tx_status_ni - transmit status callback (in process context)
+ *
+ * Like ieee80211_tx_status() but can be called in process context.
+ *
+ * Calls to this function, ieee80211_tx_status() and
+ * ieee80211_tx_status_irqsafe() may not be mixed
+ * for a single hardware.
+ *
+ * @hw: the hardware the frame was transmitted by
+ * @skb: the frame that was transmitted, owned by mac80211 after this call
+ */
+static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw,
+ struct sk_buff *skb)
+{
+ local_bh_disable();
+ ieee80211_tx_status(hw, skb);
+ local_bh_enable();
+}
+
+/**
* ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback
*
* Like ieee80211_tx_status() but can be called in IRQ context
* (internally defers to a tasklet.)
*
- * Calls to this function and ieee80211_tx_status() may not be mixed for a
- * single hardware.
+ * Calls to this function, ieee80211_tx_status() and
+ * ieee80211_tx_status_ni() may not be mixed for a single hardware.
*
* @hw: the hardware the frame was transmitted by
* @skb: the frame that was transmitted, owned by mac80211 after this call