1 files changed, 139 insertions, 215 deletions

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index e03b1773966d..672566b89ecf 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -86,8 +86,7 @@ static unsigned char	fec_mac_default[] = {
 #endif
 #endif /* CONFIG_M5272 */
 
-/* Forward declarations of some structures to support different PHYs
-*/
+/* Forward declarations of some structures to support different PHYs */
 
 typedef struct {
         uint mii_data;
@@ -123,8 +122,7 @@ typedef struct {
 #error "FEC: descriptor ring size constants too large"
 #endif
 
-/* Interrupt events/masks.
-*/
+/* Interrupt events/masks. */
 #define FEC_ENET_HBERR  ((uint)0x80000000)      /* Heartbeat error */
 #define FEC_ENET_BABR   ((uint)0x40000000)      /* Babbling receiver */
 #define FEC_ENET_BABT   ((uint)0x20000000)      /* Babbling transmitter */
@@ -177,15 +175,14 @@ struct fec_enet_private {
         ushort  skb_cur;
         ushort  skb_dirty;
 
-        /* CPM dual port RAM relative addresses.
-        */
+        /* CPM dual port RAM relative addresses */
         dma_addr_t      bd_dma;
-        /* Address of Rx and Tx buffers. */
+        /* Address of Rx and Tx buffers */
         struct bufdesc  *rx_bd_base;
         struct bufdesc  *tx_bd_base;
         /* The next free ring entry */
         struct bufdesc  *cur_rx, *cur_tx; 
-        /* The ring entries to be free()ed. */
+        /* The ring entries to be free()ed */
         struct bufdesc  *dirty_tx;
 
         uint    tx_full;
@@ -245,19 +242,16 @@ static mii_list_t	*mii_tail;
 static int      mii_queue(struct net_device *dev, int request,
                                 void (*func)(uint, struct net_device *));
 
-/* Make MII read/write commands for the FEC.
-*/
+/* Make MII read/write commands for the FEC */
 #define mk_mii_read(REG)        (0x60020000 | ((REG & 0x1f) << 18))
 #define mk_mii_write(REG, VAL)  (0x50020000 | ((REG & 0x1f) << 18) | \
                                                 (VAL & 0xffff))
 #define mk_mii_end      0
 
-/* Transmitter timeout.
-*/
-#define TX_TIMEOUT (2*HZ)
+/* Transmitter timeout */
+#define TX_TIMEOUT (2 * HZ)
 
-/* Register definitions for the PHY.
-*/
+/* Register definitions for the PHY */
 
 #define MII_REG_CR          0  /* Control Register                         */
 #define MII_REG_SR          1  /* Status Register                          */
@@ -307,7 +301,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
         bdp = fep->cur_tx;
 
         status = bdp->cbd_sc;
-#ifndef final_version
+
         if (status & BD_ENET_TX_READY) {
                 /* Ooops.  All transmit buffers are full.  Bail out.
                  * This should not happen, since dev->tbusy should be set.
@@ -316,21 +310,18 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
                 spin_unlock_irqrestore(&fep->hw_lock, flags);
                 return 1;
         }
-#endif
 
-        /* Clear all of the status flags.
-         */
+        /* Clear all of the status flags */
         status &= ~BD_ENET_TX_STATS;
 
-        /* Set buffer length and buffer pointer.
-        */
+        /* Set buffer length and buffer pointer */
         bdp->cbd_bufaddr = __pa(skb->data);
         bdp->cbd_datlen = skb->len;
 
         /*
-         *      On some FEC implementations data must be aligned on
-         *      4-byte boundaries. Use bounce buffers to copy data
-         *      and get it aligned. Ugh.
+         * On some FEC implementations data must be aligned on
+         * 4-byte boundaries. Use bounce buffers to copy data
+         * and get it aligned. Ugh.
          */
         if (bdp->cbd_bufaddr & FEC_ALIGNMENT) {
                 unsigned int index;
@@ -339,8 +330,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
                 bdp->cbd_bufaddr = __pa(fep->tx_bounce[index]);
         }
 
-        /* Save skb pointer.
-        */
+        /* Save skb pointer */
         fep->tx_skbuff[fep->skb_cur] = skb;
 
         dev->stats.tx_bytes += skb->len;
@@ -355,7 +345,6 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
         /* Send it on its way.  Tell FEC it's ready, interrupt when done,
          * it's the last BD of the frame, and to put the CRC on the end.
          */
-
         status |= (BD_ENET_TX_READY | BD_ENET_TX_INTR
                         | BD_ENET_TX_LAST | BD_ENET_TX_TC);
         bdp->cbd_sc = status;
@@ -365,13 +354,11 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
         /* Trigger transmission start */
         writel(0, fep->hwp + FEC_X_DES_ACTIVE);
 
-        /* If this was the last BD in the ring, start at the beginning again.
-        */
-        if (status & BD_ENET_TX_WRAP) {
+        /* If this was the last BD in the ring, start at the beginning again. */
+        if (status & BD_ENET_TX_WRAP)
                 bdp = fep->tx_bd_base;
-        } else {
+        else
                 bdp++;
-        }
 
         if (bdp == fep->dirty_tx) {
                 fep->tx_full = 1;
@@ -429,9 +416,6 @@ fec_timeout(struct net_device *dev)
         netif_wake_queue(dev);
 }
 
-/* The interrupt handler.
- * This is called from the MPC core interrupt.
- */
 static irqreturn_t
 fec_enet_interrupt(int irq, void * dev_id)
 {
@@ -440,12 +424,10 @@ fec_enet_interrupt(int irq, void * dev_id)
         uint    int_events;
         irqreturn_t ret = IRQ_NONE;
 
-        /* Get the interrupt events that caused us to be here. */
         do {
                 int_events = readl(fep->hwp + FEC_IEVENT);
                 writel(int_events, fep->hwp + FEC_IEVENT);
 
-                /* Handle receive event in its own function. */
                 if (int_events & FEC_ENET_RXF) {
                         ret = IRQ_HANDLED;
                         fec_enet_rx(dev);
@@ -506,31 +488,27 @@ fec_enet_tx(struct net_device *dev)
                         dev->stats.tx_packets++;
                 }
 
-#ifndef final_version
                 if (status & BD_ENET_TX_READY)
                         printk("HEY! Enet xmit interrupt and TX_READY.\n");
-#endif
+
                 /* Deferred means some collisions occurred during transmit,
                  * but we eventually sent the packet OK.
                  */
                 if (status & BD_ENET_TX_DEF)
                         dev->stats.collisions++;
 
-                /* Free the sk buffer associated with this last transmit.
-                 */
+                /* Free the sk buffer associated with this last transmit */
                 dev_kfree_skb_any(skb);
                 fep->tx_skbuff[fep->skb_dirty] = NULL;
                 fep->skb_dirty = (fep->skb_dirty + 1) & TX_RING_MOD_MASK;
 
-                /* Update pointer to next buffer descriptor to be transmitted.
-                 */
+                /* Update pointer to next buffer descriptor to be transmitted */
                 if (status & BD_ENET_TX_WRAP)
                         bdp = fep->tx_bd_base;
                 else
                         bdp++;
 
-                /* Since we have freed up a buffer, the ring is no longer
-                 * full.
+                /* Since we have freed up a buffer, the ring is no longer full
                  */
                 if (fep->tx_full) {
                         fep->tx_full = 0;
@@ -569,114 +547,93 @@ fec_enet_rx(struct net_device *dev)
          */
         bdp = fep->cur_rx;
 
-while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
+        while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
 
-#ifndef final_version
-        /* Since we have allocated space to hold a complete frame,
-         * the last indicator should be set.
-         */
-        if ((status & BD_ENET_RX_LAST) == 0)
-                printk("FEC ENET: rcv is not +last\n");
-#endif
+                /* Since we have allocated space to hold a complete frame,
+                 * the last indicator should be set.
+                 */
+                if ((status & BD_ENET_RX_LAST) == 0)
+                        printk("FEC ENET: rcv is not +last\n");
 
-        if (!fep->opened)
-                goto rx_processing_done;
+                if (!fep->opened)
+                        goto rx_processing_done;
 
-        /* Check for errors. */
-        if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
+                /* Check for errors. */
+                if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
                            BD_ENET_RX_CR | BD_ENET_RX_OV)) {
-                dev->stats.rx_errors++;
-                if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
-                /* Frame too long or too short. */
-                        dev->stats.rx_length_errors++;
+                        dev->stats.rx_errors++;
+                        if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
+                                /* Frame too long or too short. */
+                                dev->stats.rx_length_errors++;
+                        }
+                        if (status & BD_ENET_RX_NO)     /* Frame alignment */
+                                dev->stats.rx_frame_errors++;
+                        if (status & BD_ENET_RX_CR)     /* CRC Error */
+                                dev->stats.rx_crc_errors++;
+                        if (status & BD_ENET_RX_OV)     /* FIFO overrun */
+                                dev->stats.rx_fifo_errors++;
                 }
-                if (status & BD_ENET_RX_NO)     /* Frame alignment */
-                        dev->stats.rx_frame_errors++;
-                if (status & BD_ENET_RX_CR)     /* CRC Error */
-                        dev->stats.rx_crc_errors++;
-                if (status & BD_ENET_RX_OV)     /* FIFO overrun */
-                        dev->stats.rx_fifo_errors++;
-        }
 
-        /* Report late collisions as a frame error.
-         * On this error, the BD is closed, but we don't know what we
-         * have in the buffer.  So, just drop this frame on the floor.
-         */
-        if (status & BD_ENET_RX_CL) {
-                dev->stats.rx_errors++;
-                dev->stats.rx_frame_errors++;
-                goto rx_processing_done;
-        }
+                /* Report late collisions as a frame error.
+                 * On this error, the BD is closed, but we don't know what we
+                 * have in the buffer.  So, just drop this frame on the floor.
+                 */
+                if (status & BD_ENET_RX_CL) {
+                        dev->stats.rx_errors++;
+                        dev->stats.rx_frame_errors++;
+                        goto rx_processing_done;
+                }
 
-        /* Process the incoming frame.
-         */
-        dev->stats.rx_packets++;
-        pkt_len = bdp->cbd_datlen;
-        dev->stats.rx_bytes += pkt_len;
-        data = (__u8*)__va(bdp->cbd_bufaddr);
+                /* Process the incoming frame. */
+                dev->stats.rx_packets++;
+                pkt_len = bdp->cbd_datlen;
+                dev->stats.rx_bytes += pkt_len;
+                data = (__u8*)__va(bdp->cbd_bufaddr);
 
-        dma_sync_single(NULL, (unsigned long)__pa(data),
+                dma_sync_single(NULL, (unsigned long)__pa(data),
                         pkt_len - 4, DMA_FROM_DEVICE);
 
-        /* This does 16 byte alignment, exactly what we need.
-         * The packet length includes FCS, but we don't want to
-         * include that when passing upstream as it messes up
-         * bridging applications.
-         */
-        skb = dev_alloc_skb(pkt_len-4);
-
-        if (skb == NULL) {
-                printk("%s: Memory squeeze, dropping packet.\n", dev->name);
-                dev->stats.rx_dropped++;
-        } else {
-                skb_put(skb,pkt_len-4); /* Make room */
-                skb_copy_to_linear_data(skb, data, pkt_len-4);
-                skb->protocol=eth_type_trans(skb,dev);
-                netif_rx(skb);
-        }
-  rx_processing_done:
-
-        /* Clear the status flags for this buffer.
-        */
-        status &= ~BD_ENET_RX_STATS;
+                /* This does 16 byte alignment, exactly what we need.
+                 * The packet length includes FCS, but we don't want to
+                 * include that when passing upstream as it messes up
+                 * bridging applications.
+                 */
+                skb = dev_alloc_skb(pkt_len - 4);
 
-        /* Mark the buffer empty.
-        */
-        status |= BD_ENET_RX_EMPTY;
-        bdp->cbd_sc = status;
+                if (skb == NULL) {
+                        printk("%s: Memory squeeze, dropping packet.\n",
+                                        dev->name);
+                        dev->stats.rx_dropped++;
+                } else {
+                        skb_put(skb, pkt_len - 4);      /* Make room */
+                        skb_copy_to_linear_data(skb, data, pkt_len - 4);
+                        skb->protocol = eth_type_trans(skb, dev);
+                        netif_rx(skb);
+                }
+rx_processing_done:
+                /* Clear the status flags for this buffer */
+                status &= ~BD_ENET_RX_STATS;
 
-        /* Update BD pointer to next entry.
-        */
-        if (status & BD_ENET_RX_WRAP)
-                bdp = fep->rx_bd_base;
-        else
-                bdp++;
+                /* Mark the buffer empty */
+                status |= BD_ENET_RX_EMPTY;
+                bdp->cbd_sc = status;
 
-#if 1
-        /* Doing this here will keep the FEC running while we process
-         * incoming frames.  On a heavily loaded network, we should be
-         * able to keep up at the expense of system resources.
-         */
-        writel(0, fep->hwp + FEC_R_DES_ACTIVE);
-#endif
-   } /* while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) */
+                /* Update BD pointer to next entry */
+                if (status & BD_ENET_RX_WRAP)
+                        bdp = fep->rx_bd_base;
+                else
+                        bdp++;
+                /* Doing this here will keep the FEC running while we process
+                 * incoming frames.  On a heavily loaded network, we should be
+                 * able to keep up at the expense of system resources.
+                 */
+                writel(0, fep->hwp + FEC_R_DES_ACTIVE);
+        }
         fep->cur_rx = bdp;
 
-#if 0
-        /* Doing this here will allow us to process all frames in the
-         * ring before the FEC is allowed to put more there.  On a heavily
-         * loaded network, some frames may be lost.  Unfortunately, this
-         * increases the interrupt overhead since we can potentially work
-         * our way back to the interrupt return only to come right back
-         * here.
-         */
-        fecp->fec_r_des_active = 0;
-#endif
-
         spin_unlock_irq(&fep->hw_lock);
 }
 
-
 /* called from interrupt context */
 static void
 fec_enet_mii(struct net_device *dev)
@@ -714,8 +671,7 @@ mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_devi
         mii_list_t      *mip;
         int             retval;
 
-        /* Add PHY address to register command.
-        */
+        /* Add PHY address to register command */
         fep = netdev_priv(dev);
         spin_lock_irqsave(&fep->mii_lock, flags);
 
@@ -1358,11 +1314,6 @@ static void mii_relink(struct work_struct *work)
                 fec_restart(dev, duplex);
         } else
                 fec_stop(dev);
-
-#if 0
-        enable_irq(fep->mii_irq);
-#endif
-
 }
 
 /* mii_queue_relink is called in interrupt context from mii_link_interrupt */
@@ -1371,12 +1322,12 @@ static void mii_queue_relink(uint mii_reg, struct net_device *dev)
         struct fec_enet_private *fep = netdev_priv(dev);
 
         /*
-        ** We cannot queue phy_task twice in the workqueue.  It
-        ** would cause an endless loop in the workqueue.
-        ** Fortunately, if the last mii_relink entry has not yet been
-        ** executed now, it will do the job for the current interrupt,
-        ** which is just what we want.
-        */
+         * We cannot queue phy_task twice in the workqueue.  It
+         * would cause an endless loop in the workqueue.
+         * Fortunately, if the last mii_relink entry has not yet been
+         * executed now, it will do the job for the current interrupt,
+         * which is just what we want.
+         */
         if (fep->mii_phy_task_queued)
                 return;
 
@@ -1407,8 +1358,7 @@ phy_cmd_t const phy_cmd_config[] = {
         { mk_mii_end, }
         };
 
-/* Read remainder of PHY ID.
-*/
+/* Read remainder of PHY ID. */
 static void
 mii_discover_phy3(uint mii_reg, struct net_device *dev)
 {
@@ -1447,8 +1397,7 @@ mii_discover_phy(uint mii_reg, struct net_device *dev)
         if (fep->phy_addr < 32) {
                 if ((phytype = (mii_reg & 0xffff)) != 0xffff && phytype != 0) {
 
-                        /* Got first part of ID, now get remainder.
-                        */
+                        /* Got first part of ID, now get remainder */
                         fep->phy_id = phytype << 16;
                         mii_queue(dev, mk_mii_read(MII_REG_PHYIR2),
                                                         mii_discover_phy3);
@@ -1468,8 +1417,7 @@ mii_discover_phy(uint mii_reg, struct net_device *dev)
         }
 }
 
-/* This interrupt occurs when the PHY detects a link change.
-*/
+/* This interrupt occurs when the PHY detects a link change */
 #ifdef HAVE_mii_link_interrupt
 static irqreturn_t
 mii_link_interrupt(int irq, void * dev_id)
@@ -1479,10 +1427,6 @@ mii_link_interrupt(int irq, void * dev_id)
 
         fec_phy_ack_intr();
 
-#if 0
-        disable_irq(fep->mii_irq);  /* disable now, enable later */
-#endif
-
         mii_do_cmd(dev, fep->phy->ack_int);
         mii_do_cmd(dev, phy_cmd_relink);  /* restart and display status */
 
@@ -1533,7 +1477,7 @@ fec_enet_open(struct net_device *dev)
 
         netif_start_queue(dev);
         fep->opened = 1;
-        return 0;               /* Success */
+        return 0;
 }
 
 static int
@@ -1541,8 +1485,7 @@ fec_enet_close(struct net_device *dev)
 {
         struct fec_enet_private *fep = netdev_priv(dev);
 
-        /* Don't know what to do yet.
-        */
+        /* Don't know what to do yet. */
         fep->opened = 0;
         netif_stop_queue(dev);
         fec_stop(dev);
@@ -1570,7 +1513,7 @@ static void set_multicast_list(struct net_device *dev)
         unsigned int i, j, bit, data, crc, tmp;
         unsigned char hash;
 
-        if (dev->flags&IFF_PROMISC) {
+        if (dev->flags & IFF_PROMISC) {
                 tmp = readl(fep->hwp + FEC_R_CNTRL);
                 tmp |= 0x8;
                 writel(tmp, fep->hwp + FEC_R_CNTRL);
@@ -1581,42 +1524,37 @@ static void set_multicast_list(struct net_device *dev)
 
                 if (dev->flags & IFF_ALLMULTI) {
                         /* Catch all multicast addresses, so set the
-                         * filter to all 1's.
+                         * filter to all 1's
                          */
                         writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
                         writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
                 } else {
-                        /* Clear filter and add the addresses in hash register.
-                        */
+                        /* Clear filter and add the addresses in hash register
+                         */
                         writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
                         writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
 
                         dmi = dev->mc_list;
 
-                        for (j = 0; j < dev->mc_count; j++, dmi = dmi->next)
-                        {
-                                /* Only support group multicast for now.
-                                */
+                        for (j = 0; j < dev->mc_count; j++, dmi = dmi->next) {
+                                /* Only support group multicast for now */
                                 if (!(dmi->dmi_addr[0] & 1))
                                         continue;
 
-                                /* calculate crc32 value of mac address
-                                */
+                                /* calculate crc32 value of mac address */
                                 crc = 0xffffffff;
 
-                                for (i = 0; i < dmi->dmi_addrlen; i++)
-                                {
+                                for (i = 0; i < dmi->dmi_addrlen; i++) {
                                         data = dmi->dmi_addr[i];
-                                        for (bit = 0; bit < 8; bit++, data >>= 1)
-                                        {
+                                        for (bit = 0; bit < 8; bit++, data >>= 1) {
                                                 crc = (crc >> 1) ^
                                                 (((crc ^ data) & 1) ? CRC32_POLY : 0);
                                         }
                                 }
 
                                 /* only upper 6 bits (HASH_BITS) are used
-                                   which point to specific bit in he hash registers
-                                */
+                                 * which point to specific bit in he hash registers
+                                 */
                                 hash = (crc >> (32 - HASH_BITS)) & 0x3f;
 
                                 if (hash > 31) {
@@ -1633,8 +1571,7 @@ static void set_multicast_list(struct net_device *dev)
         }
 }
 
-/* Set a MAC change in hardware.
- */
+/* Set a MAC change in hardware. */
 static void
 fec_set_mac_address(struct net_device *dev)
 {
@@ -1675,8 +1612,7 @@ int __init fec_enet_init(struct net_device *dev, int index)
         fep->hwp = (void __iomem *)dev->base_addr;
         fep->netdev = dev;
 
-        /* Whack a reset.  We should wait for this.
-        */
+        /* Whack a reset.  We should wait for this. */
         writel(1, fep->hwp + FEC_ECNTRL);
         udelay(10);
 
@@ -1706,18 +1642,15 @@ int __init fec_enet_init(struct net_device *dev, int index)
 
         fep->skb_cur = fep->skb_dirty = 0;
 
-        /* Initialize the receive buffer descriptors.
-        */
+        /* Initialize the receive buffer descriptors. */
         bdp = fep->rx_bd_base;
         for (i=0; i<FEC_ENET_RX_PAGES; i++) {
 
-                /* Allocate a page.
-                */
+                /* Allocate a page */
                 mem_addr = __get_free_page(GFP_KERNEL);
                 /* XXX: missing check for allocation failure */
 
-                /* Initialize the BD for every fragment in the page.
-                */
+                /* Initialize the BD for every fragment in the page */
                 for (j=0; j<FEC_ENET_RX_FRPPG; j++) {
                         bdp->cbd_sc = BD_ENET_RX_EMPTY;
                         bdp->cbd_bufaddr = __pa(mem_addr);
@@ -1726,13 +1659,11 @@ int __init fec_enet_init(struct net_device *dev, int index)
                 }
         }
 
-        /* Set the last buffer to wrap.
-        */
+        /* Set the last buffer to wrap */
         bdp--;
         bdp->cbd_sc |= BD_SC_WRAP;
 
-        /* ...and the same for transmmit.
-        */
+        /* ...and the same for transmit */
         bdp = fep->tx_bd_base;
         for (i=0, j=FEC_ENET_TX_FRPPG; i<TX_RING_SIZE; i++) {
                 if (j >= FEC_ENET_TX_FRPPG) {
@@ -1744,20 +1675,17 @@ int __init fec_enet_init(struct net_device *dev, int index)
                 }
                 fep->tx_bounce[i] = (unsigned char *) mem_addr;
 
-                /* Initialize the BD for every fragment in the page.
-                */
+                /* Initialize the BD for every fragment in the page */
                 bdp->cbd_sc = 0;
                 bdp->cbd_bufaddr = 0;
                 bdp++;
         }
 
-        /* Set the last buffer to wrap.
-        */
+        /* Set the last buffer to wrap */
         bdp--;
         bdp->cbd_sc |= BD_SC_WRAP;
 
-        /* Set receive and transmit descriptor base.
-        */
+        /* Set receive and transmit descriptor base */
         writel(fep->bd_dma, fep->hwp + FEC_R_DES_START);
         writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc) * RX_RING_SIZE,
                         fep->hwp + FEC_X_DES_START);
@@ -1776,7 +1704,7 @@ int __init fec_enet_init(struct net_device *dev, int index)
         writel(0, fep->hwp + FEC_HASH_TABLE_LOW);
 #endif
 
-        /* The FEC Ethernet specific entries in the device structure. */
+        /* The FEC Ethernet specific entries in the device structure */
         dev->open = fec_enet_open;
         dev->hard_start_xmit = fec_enet_start_xmit;
         dev->tx_timeout = fec_timeout;
@@ -1792,9 +1720,7 @@ int __init fec_enet_init(struct net_device *dev, int index)
         writel(OPT_FRAME_SIZE | 0x04, fep->hwp + FEC_R_CNTRL);
         writel(0, fep->hwp + FEC_X_CNTRL);
 
-        /*
-         * Set MII speed to 2.5 MHz
-         */
+        /* Set MII speed to 2.5 MHz */
         fep->phy_speed = ((((clk_get_rate(fep->clk) / 2 + 4999999)
                                         / 2500000) / 2) & 0x3F) << 1;
         writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
@@ -1853,8 +1779,8 @@ fec_restart(struct net_device *dev, int duplex)
 
         /* Reset SKB transmit buffers. */
         fep->skb_cur = fep->skb_dirty = 0;
-        for (i=0; i<=TX_RING_MOD_MASK; i++) {
-                if (fep->tx_skbuff[i] != NULL) {
+        for (i = 0; i <= TX_RING_MOD_MASK; i++) {
+                if (fep->tx_skbuff[i]) {
                         dev_kfree_skb_any(fep->tx_skbuff[i]);
                         fep->tx_skbuff[i] = NULL;
                 }
@@ -1862,20 +1788,20 @@ fec_restart(struct net_device *dev, int duplex)
 
         /* Initialize the receive buffer descriptors. */
         bdp = fep->rx_bd_base;
-        for (i=0; i<RX_RING_SIZE; i++) {
+        for (i = 0; i < RX_RING_SIZE; i++) {
 
                 /* Initialize the BD for every fragment in the page. */
                 bdp->cbd_sc = BD_ENET_RX_EMPTY;
                 bdp++;
         }
 
-        /* Set the last buffer to wrap. */
+        /* Set the last buffer to wrap */
         bdp--;
         bdp->cbd_sc |= BD_SC_WRAP;
 
-        /* ...and the same for transmmit. */
+        /* ...and the same for transmit */
         bdp = fep->tx_bd_base;
-        for (i=0; i<TX_RING_SIZE; i++) {
+        for (i = 0; i < TX_RING_SIZE; i++) {
 
                 /* Initialize the BD for every fragment in the page. */
                 bdp->cbd_sc = 0;
@@ -1883,11 +1809,11 @@ fec_restart(struct net_device *dev, int duplex)
                 bdp++;
         }
 
-        /* Set the last buffer to wrap. */
+        /* Set the last buffer to wrap */
         bdp--;
         bdp->cbd_sc |= BD_SC_WRAP;
 
-        /* Enable MII mode. */
+        /* Enable MII mode */
         if (duplex) {
                 /* MII enable / FD enable */
                 writel(OPT_FRAME_SIZE | 0x04, fep->hwp + FEC_R_CNTRL);
@@ -1899,14 +1825,14 @@ fec_restart(struct net_device *dev, int duplex)
         }
         fep->full_duplex = duplex;
 
-        /* Set MII speed. */
+        /* Set MII speed */
         writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
 
-        /* And last, enable the transmit and receive processing. */
+        /* And last, enable the transmit and receive processing */
         writel(2, fep->hwp + FEC_ECNTRL);
         writel(0, fep->hwp + FEC_R_DES_ACTIVE);
 
-        /* Enable interrupts we wish to service. */
+        /* Enable interrupts we wish to service */
         writel(FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII,
                         fep->hwp + FEC_IMASK);
 }
@@ -1916,9 +1842,7 @@ fec_stop(struct net_device *dev)
 {
         struct fec_enet_private *fep = netdev_priv(dev);
 
-        /*
-        ** We cannot expect a graceful transmit stop without link !!!
-        */
+        /* We cannot expect a graceful transmit stop without link !!! */
         if (fep->link) {
                 writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */
                 udelay(10);