diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-06-20 21:36:45 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-06-29 14:55:36 +0300 |
| commit | 84a0d4669c8fdbe6e3e23937c5083af99a1946f2 (patch) | |
| tree | 5889eecdd7ec07c3301a5e3f5192f9d4a7bb4365 /drivers/net/wireless/ath/ath9k/wmi.c | |
| parent | fe041deba4f6a857cd9d0c08a84b9f1709ede2b1 (diff) | |
ath9k: use irqsave() in USB's complete callback
The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.
Cc: QCA ath9k Development <ath9k-devel@qca.qualcomm.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/wmi.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/wmi.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c index b0b5579b7560..d1f6710ca63b 100644 --- a/drivers/net/wireless/ath/ath9k/wmi.c +++ b/drivers/net/wireless/ath/ath9k/wmi.c @@ -209,6 +209,7 @@ static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb, { struct wmi *wmi = priv; struct wmi_cmd_hdr *hdr; + unsigned long flags; u16 cmd_id; if (unlikely(wmi->stopped)) @@ -218,20 +219,20 @@ static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb, cmd_id = be16_to_cpu(hdr->command_id); if (cmd_id & 0x1000) { - spin_lock(&wmi->wmi_lock); + spin_lock_irqsave(&wmi->wmi_lock, flags); __skb_queue_tail(&wmi->wmi_event_queue, skb); - spin_unlock(&wmi->wmi_lock); + spin_unlock_irqrestore(&wmi->wmi_lock, flags); tasklet_schedule(&wmi->wmi_event_tasklet); return; } /* Check if there has been a timeout. */ - spin_lock(&wmi->wmi_lock); + spin_lock_irqsave(&wmi->wmi_lock, flags); if (be16_to_cpu(hdr->seq_no) != wmi->last_seq_id) { - spin_unlock(&wmi->wmi_lock); + spin_unlock_irqrestore(&wmi->wmi_lock, flags); goto free_skb; } - spin_unlock(&wmi->wmi_lock); + spin_unlock_irqrestore(&wmi->wmi_lock, flags); /* WMI command response */ ath9k_wmi_rsp_callback(wmi, skb); |