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net: usb: rtl8150: use irqsave() in USB's complete callback

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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: Petko Manolov <petkan@nucleusys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sebastian Andrzej Siewior 2018-06-20 21:31:21 +02:00 committed by David S. Miller
parent ed7aa30e86
commit feae641d29
1 changed files with 3 additions and 2 deletions
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5
drivers/net/usb/rtl8150.c
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@ -391,6 +391,7 @@ static void read_bulk_callback(struct urb *urb)
u16 rx_stat;
int status = urb->status;
int result;
unsigned long flags;
dev = urb->context;
if (!dev)
@ -432,9 +433,9 @@ static void read_bulk_callback(struct urb *urb)
netdev->stats.rx_packets++;
netdev->stats.rx_bytes += pkt_len;
spin_lock(&dev->rx_pool_lock);
spin_lock_irqsave(&dev->rx_pool_lock, flags);
skb = pull_skb(dev);
spin_unlock(&dev->rx_pool_lock);
spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
if (!skb)
goto resched;