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authorKomuro <komurojun@nifty.com>2007-07-23 21:36:06 +0900
committerJeff Garzik <jeff@garzik.org>2007-07-30 15:58:13 -0400
commit85e27831941e0d907be8e244202a293d74730e12 (patch)
tree906ebc4b9141582a422cb4aa94e50d2709adba8c /drivers/net/pcmcia
parent573608e4cde2aa3b76120685fba945d889b2ba57 (diff)
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>
Diffstat (limited to 'drivers/net/pcmcia')
-rw-r--r--drivers/net/pcmcia/smc91c92_cs.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/net/pcmcia/smc91c92_cs.c b/drivers/net/pcmcia/smc91c92_cs.c
index 7912dbd14251..af6728cb49c3 100644
--- a/drivers/net/pcmcia/smc91c92_cs.c
+++ b/drivers/net/pcmcia/smc91c92_cs.c
@@ -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 @@ irq_done:
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 @@ reschedule:
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;
}