On 03/11/2015 12:19 PM, Nicholas Mc Guire wrote:
Putting code into the parameter list of wait_event_timeout() might be
legal C-code but not really readable - the "inline" code is simply
moved into a function and that passed to wait_event_timeout() as the
condition.
Signed-off-by: Nicholas Mc Guire <hofrat@xxxxxxxxx>
---
Thanks to Bjorn Mork <bjorn@xxxxxxx> for clarifying my initial confusion !
Patch was only compile tested with x86_64_defconfig + CONFIG_ATH_CARDS=m,
CONFIG_ATH10K=m
Patch is against 4.0-rc3 (localversion-next is -next-20150311)
drivers/net/wireless/ath/ath10k/mac.c | 32 ++++++++++++++++++--------------
1 file changed, 18 insertions(+), 14 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index e8cc19f..7b27d99 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -4463,11 +4463,25 @@ static int ath10k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
return ret;
}
+static bool check_htt_state(struct ath10k *ar, bool skip)
+{
+ bool empty;
+
+ spin_lock_bh(&ar->htt.tx_lock);
+ empty = (ar->htt.num_pending_tx == 0);
+ spin_unlock_bh(&ar->htt.tx_lock);
+
+ skip = (ar->state == ATH10K_STATE_WEDGED) ||
+ test_bit(ATH10K_FLAG_CRASH_FLUSH,
+ &ar->dev_flags);
+ return (empty || skip);
+}
+
static void ath10k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u32 queues, bool drop)
{
struct ath10k *ar = hw->priv;
- bool skip;
+ bool skip = false;
int ret;
/* mac80211 doesn't care if we really xmit queued frames or not
@@ -4480,19 +4494,9 @@ static void ath10k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
if (ar->state == ATH10K_STATE_WEDGED)
goto skip;
- ret = wait_event_timeout(ar->htt.empty_tx_wq, ({
- bool empty;
-
- spin_lock_bh(&ar->htt.tx_lock);
- empty = (ar->htt.num_pending_tx == 0);
- spin_unlock_bh(&ar->htt.tx_lock);
-
- skip = (ar->state == ATH10K_STATE_WEDGED) ||
- test_bit(ATH10K_FLAG_CRASH_FLUSH,
- &ar->dev_flags);
-
- (empty || skip);
- }), ATH10K_FLUSH_TIMEOUT_HZ);
+ ret = wait_event_timeout(ar->htt.empty_tx_wq,
+ check_htt_state(ar, skip),
+ ATH10K_FLUSH_TIMEOUT_HZ);
if (ret <= 0 || skip)
ath10k_warn(ar, "failed to flush transmit queue (skip %i ar-state %i): %i\n",
Doesn't this change not assign to 'skip' in the calling function? So
you'd want to make it:
static bool check_htt_state(struct ath10k *ar, bool *skip)
{
bool empty;
spin_lock_bh(&ar->htt.tx_lock);
empty = (ar->htt.num_pending_tx == 0);
spin_unlock_bh(&ar->htt.tx_lock);
*skip = (ar->state == ATH10K_STATE_WEDGED) ||
test_bit(ATH10K_FLAG_CRASH_FLUSH,
&ar->dev_flags);
return (empty || *skip);
}
ret = wait_event_timeout(ar->htt.empty_tx_wq,
check_htt_state(ar, &skip),
ATH10K_FLUSH_TIMEOUT_HZ);
To preserve the previous behavior?
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