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