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PATCH kernel 2.6.22] PCMCIA-NETDEV : modify smc91c92_cs.c to become SMP safe 

protect smc_start_xmit, smc_interrupt and media_check by spin_lock.

Signed-off-by: Komuro <komurojun-mbn@nifty.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Komuro 2007-07-23 21:36:06 +09:00 committed by Jeff Garzik
parent 573608e4cd
commit 85e2783194
1 changed files with 17 additions and 6 deletions
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23
drivers/net/pcmcia/smc91c92_cs.c
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@ -1368,6 +1368,7 @@ static int smc_start_xmit(struct sk_buff *skb, struct net_device *dev)
kio_addr_t ioaddr = dev->base_addr;
u_short num_pages;
short time_out, ir;
unsigned long flags;
netif_stop_queue(dev);
@ -1395,6 +1396,7 @@ static int smc_start_xmit(struct sk_buff *skb, struct net_device *dev)
/* A packet is now waiting. */
smc->packets_waiting++;
spin_lock_irqsave(&smc->lock, flags);
SMC_SELECT_BANK(2); /* Paranoia, we should always be in window 2 */
/* need MC_RESET to keep the memory consistent. errata? */
@ -1411,6 +1413,7 @@ static int smc_start_xmit(struct sk_buff *skb, struct net_device *dev)
/* Acknowledge the interrupt, send the packet. */
outw((ir&0xff00) | IM_ALLOC_INT, ioaddr + INTERRUPT);
smc_hardware_send_packet(dev); /* Send the packet now.. */
spin_unlock_irqrestore(&smc->lock, flags);
return 0;
}
}
@ -1418,6 +1421,7 @@ static int smc_start_xmit(struct sk_buff *skb, struct net_device *dev)
/* Otherwise defer until the Tx-space-allocated interrupt. */
DEBUG(2, "%s: memory allocation deferred.\n", dev->name);
outw((IM_ALLOC_INT << 8) | (ir & 0xff00), ioaddr + INTERRUPT);
spin_unlock_irqrestore(&smc->lock, flags);
return 0;
}
@ -1523,6 +1527,7 @@ static irqreturn_t smc_interrupt(int irq, void *dev_id)
DEBUG(3, "%s: SMC91c92 interrupt %d at %#x.\n", dev->name,
irq, ioaddr);
spin_lock(&smc->lock);
smc->watchdog = 0;
saved_bank = inw(ioaddr + BANK_SELECT);
if ((saved_bank & 0xff00) != 0x3300) {
@ -1620,6 +1625,7 @@ static irqreturn_t smc_interrupt(int irq, void *dev_id)
readb(smc->base+MEGAHERTZ_ISR);
}
#endif
spin_unlock(&smc->lock);
return IRQ_RETVAL(handled);
}
@ -1902,6 +1908,9 @@ static void media_check(u_long arg)
kio_addr_t ioaddr = dev->base_addr;
u_short i, media, saved_bank;
u_short link;
unsigned long flags;
spin_lock_irqsave(&smc->lock, flags);
saved_bank = inw(ioaddr + BANK_SELECT);
@ -1934,6 +1943,7 @@ static void media_check(u_long arg)
smc->media.expires = jiffies + HZ/100;
add_timer(&smc->media);
SMC_SELECT_BANK(saved_bank);
spin_unlock_irqrestore(&smc->lock, flags);
return;
}
@ -2007,6 +2017,7 @@ static void media_check(u_long arg)
smc->media.expires = jiffies + HZ;
add_timer(&smc->media);
SMC_SELECT_BANK(saved_bank);
spin_unlock_irqrestore(&smc->lock, flags);
}
static int smc_link_ok(struct net_device *dev)
@ -2094,14 +2105,14 @@ static int smc_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
u16 saved_bank = inw(ioaddr + BANK_SELECT);
int ret;
SMC_SELECT_BANK(3);
spin_lock_irq(&smc->lock);
SMC_SELECT_BANK(3);
if (smc->cfg & CFG_MII_SELECT)
ret = mii_ethtool_gset(&smc->mii_if, ecmd);
else
ret = smc_netdev_get_ecmd(dev, ecmd);
spin_unlock_irq(&smc->lock);
SMC_SELECT_BANK(saved_bank);
spin_unlock_irq(&smc->lock);
return ret;
}
@ -2112,14 +2123,14 @@ static int smc_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
u16 saved_bank = inw(ioaddr + BANK_SELECT);
int ret;
SMC_SELECT_BANK(3);
spin_lock_irq(&smc->lock);
SMC_SELECT_BANK(3);
if (smc->cfg & CFG_MII_SELECT)
ret = mii_ethtool_sset(&smc->mii_if, ecmd);
else
ret = smc_netdev_set_ecmd(dev, ecmd);
spin_unlock_irq(&smc->lock);
SMC_SELECT_BANK(saved_bank);
spin_unlock_irq(&smc->lock);
return ret;
}
@ -2130,11 +2141,11 @@ static u32 smc_get_link(struct net_device *dev)
u16 saved_bank = inw(ioaddr + BANK_SELECT);
u32 ret;
SMC_SELECT_BANK(3);
spin_lock_irq(&smc->lock);
SMC_SELECT_BANK(3);
ret = smc_link_ok(dev);
spin_unlock_irq(&smc->lock);
SMC_SELECT_BANK(saved_bank);
spin_unlock_irq(&smc->lock);
return ret;
}