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net: tundra: tsi108: use spin_lock_irqsave instead of spin_lock_irq in IRQ context

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[ Upstream commit 8c25d0887a ]

As spin_unlock_irq will enable interrupts.
Function tsi108_stat_carry is called from interrupt handler tsi108_irq.
Interrupts are enabled in interrupt handler.
Use spin_lock_irqsave/spin_unlock_irqrestore instead of spin_(un)lock_irq
in IRQ context to avoid this.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Fuqian Huang
2019-08-09 13:35:39 +08:00
committed by Chris
parent 6e325283b6
commit c9e558b975
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/tundra/tsi108_eth.c
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@@ -381,9 +381,10 @@ tsi108_stat_carry_one(int carry, int carry_bit, int carry_shift,
static void tsi108_stat_carry(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
unsigned long flags;
u32 carry1, carry2;
spin_lock_irq(&data->misclock);
spin_lock_irqsave(&data->misclock, flags);
carry1 = TSI_READ(TSI108_STAT_CARRY1);
carry2 = TSI_READ(TSI108_STAT_CARRY2);
@@ -451,7 +452,7 @@ static void tsi108_stat_carry(struct net_device *dev)
TSI108_STAT_TXPAUSEDROP_CARRY,
&data->tx_pause_drop);
spin_unlock_irq(&data->misclock);
spin_unlock_irqrestore(&data->misclock, flags);
}
/* Read a stat counter atomically with respect to carries.