diff options
author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-06-20 21:36:45 +0200 |
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committer | Kalle Valo <kvalo@codeaurora.org> | 2018-06-29 13:55:36 +0200 |
commit | 84a0d4669c8fdbe6e3e23937c5083af99a1946f2 (patch) | |
tree | 5889eecdd7ec07c3301a5e3f5192f9d4a7bb4365 /drivers/net/wireless/ath/ath9k/hif_usb.c | |
parent | ath9k: use timespec64 for tsf_ts (diff) | |
download | linux-84a0d4669c8fdbe6e3e23937c5083af99a1946f2.tar.xz linux-84a0d4669c8fdbe6e3e23937c5083af99a1946f2.zip |
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/hif_usb.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/hif_usb.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index cb0eef13af1c..fb649d85b8fc 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -138,6 +138,7 @@ static void hif_usb_mgmt_cb(struct urb *urb) { struct cmd_buf *cmd = (struct cmd_buf *)urb->context; struct hif_device_usb *hif_dev; + unsigned long flags; bool txok = true; if (!cmd || !cmd->skb || !cmd->hif_dev) @@ -158,14 +159,14 @@ static void hif_usb_mgmt_cb(struct urb *urb) * If the URBs are being flushed, no need to complete * this packet. */ - spin_lock(&hif_dev->tx.tx_lock); + spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { - spin_unlock(&hif_dev->tx.tx_lock); + spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); dev_kfree_skb_any(cmd->skb); kfree(cmd); return; } - spin_unlock(&hif_dev->tx.tx_lock); + spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); break; default: |