forcedeth: spin_unlock_irq in interrupt handler fix

The replacement of spin_lock_irq/spin_unlock_irq pair in interrupt
handler by spin_lock_irqsave/spin_lock_irqrestore pair.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Denis Efremov <yefremov.denis@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index 8b7c512..67edc2e 100644 (file)
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -3775,7 +3775,7 @@ static irqreturn_t nv_nic_irq_other(int foo, void *data)
                        np->link_timeout = jiffies + LINK_TIMEOUT;
                }
                if (events & NVREG_IRQ_RECOVER_ERROR) {
-                       spin_lock_irq(&np->lock);
+                       spin_lock_irqsave(&np->lock, flags);
                        /* disable interrupts on the nic */
                        writel(NVREG_IRQ_OTHER, base + NvRegIrqMask);
                        pci_push(base);
@@ -3785,7 +3785,7 @@ static irqreturn_t nv_nic_irq_other(int foo, void *data)
                                np->recover_error = 1;
                                mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
                        }
-                       spin_unlock_irq(&np->lock);
+                       spin_unlock_irqrestore(&np->lock, flags);
                        break;
                }
                if (unlikely(i > max_interrupt_work)) {