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ath10k: wmi: disable softirq's while calling ieee80211_rx

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[ Upstream commit 37f62c0d58 ]

This is done in order not to trig the below warning in
ieee80211_rx_napi:

WARN_ON_ONCE(softirq_count() == 0);

ieee80211_rx_napi requires that softirq's are disabled during
execution.

The High latency bus drivers (SDIO and USB) sometimes call the wmi
ep_rx_complete callback from non softirq context, resulting in a trigger
of the above warning.

Calling ieee80211_rx_ni with softirq's already disabled (e.g., from
softirq context) should be safe as the local_bh_disable and
local_bh_enable functions (called from ieee80211_rx_ni) are fully
reentrant.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Erik Stromdahl 2018-09-04 15:07:07 +03:00 • committed by Greg Kroah-Hartman
commit d0d8f0efb6
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/ath/ath10k/wmi.c
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@ -2487,7 +2487,8 @@ int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
status->freq, status->band, status->signal,
status->rate_idx);
ieee80211_rx(ar->hw, skb);
ieee80211_rx_ni(ar->hw, skb);
return 0;
}