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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2018-06-20 21:39:06 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-06-28 12:36:07 +0200
commit24b2068e26c6f24de05c81459553cbc6cf753708 (patch)
treed78db98fa7c54ff9efd1d08240459571b2aa1dd0
parentUSB: cdc-wdm: don't enable interrupts in USB-giveback (diff)
downloadlinux-24b2068e26c6f24de05c81459553cbc6cf753708.tar.xz
linux-24b2068e26c6f24de05c81459553cbc6cf753708.zip
NFC: nfcmrvl_usb: 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: Samuel Ortiz <sameo@linux.intel.com> Cc: linux-wireless@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/nfc/nfcmrvl/usb.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/nfc/nfcmrvl/usb.c b/drivers/nfc/nfcmrvl/usb.c
index bd35eab652be..945cc903d8f1 100644
--- a/drivers/nfc/nfcmrvl/usb.c
+++ b/drivers/nfc/nfcmrvl/usb.c
@@ -160,13 +160,14 @@ static void nfcmrvl_tx_complete(struct urb *urb)
struct nci_dev *ndev = (struct nci_dev *)skb->dev;
struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data;
+ unsigned long flags;
nfc_info(priv->dev, "urb %p status %d count %d\n",
urb, urb->status, urb->actual_length);
- spin_lock(&drv_data->txlock);
+ spin_lock_irqsave(&drv_data->txlock, flags);
drv_data->tx_in_flight--;
- spin_unlock(&drv_data->txlock);
+ spin_unlock_irqrestore(&drv_data->txlock, flags);
kfree(urb->setup_packet);
kfree_skb(skb);