From: Sebastian Andrzej Siewior Date: Wed, 20 Jun 2018 19:39:06 +0000 (+0200) Subject: NFC: nfcmrvl_usb: use irqsave() in USB's complete callback X-Git-Tag: v4.19~373^2~67 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=24b2068e26c6f24de05c81459553cbc6cf753708;p=platform%2Fkernel%2Flinux-rpi.git 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 Cc: linux-wireless@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/nfc/nfcmrvl/usb.c b/drivers/nfc/nfcmrvl/usb.c index bd35eab..945cc90 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);