ucc_geth: Pass proper device to DMA routines, otherwise oops happens

The driver should pass a device that actually specifies internal DMA
ops, but currently it passes netdev's device, which is wrong and that
causes following oops:

Kernel BUG at c01c4df8 [verbose debug info unavailable]
Oops: Exception in kernel mode, sig: 5 [#1]
[...]
NIP [c01c4df8] get_new_skb+0x7c/0xf8
LR [c01c4da4] get_new_skb+0x28/0xf8
Call Trace:
[ef82be00] [c01c4da4] get_new_skb+0x28/0xf8 (unreliable)
[ef82be20] [c01c4eb8] rx_bd_buffer_set+0x44/0x98
[ef82be40] [c01c62bc] ucc_geth_startup+0x11b0/0x147c
[ef82be80] [c01c6674] ucc_geth_open+0xec/0x2a4
[ef82bea0] [c02288a4] dev_open+0xc0/0x11c
[...]

Fix this by passing of_device's device that specifies DMA ops in its
archdata.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index a124615..d3f39e8 100644 (file)
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -222,10 +222,10 @@ static struct sk_buff *get_new_skb(struct ucc_geth_private *ugeth,
                    (((unsigned)skb->data) & (UCC_GETH_RX_DATA_BUF_ALIGNMENT -
                                              1)));
 
-       skb->dev = ugeth->dev;
+       skb->dev = ugeth->ndev;
 
        out_be32(&((struct qe_bd __iomem *)bd)->buf,
-                     dma_map_single(&ugeth->dev->dev,
+                     dma_map_single(ugeth->dev,
                                     skb->data,
                                     ugeth->ug_info->uf_info.max_rx_buf_length +
                                     UCC_GETH_RX_DATA_BUF_ALIGNMENT,
@@ -1871,7 +1871,7 @@ static void ucc_geth_memclean(struct ucc_geth_private *ugeth)
                        continue;
                for (j = 0; j < ugeth->ug_info->bdRingLenTx[i]; j++) {
                        if (ugeth->tx_skbuff[i][j]) {
-                               dma_unmap_single(&ugeth->dev->dev,
+                               dma_unmap_single(ugeth->dev,
                                                 in_be32(&((struct qe_bd __iomem *)bd)->buf),
                                                 (in_be32((u32 __iomem *)bd) &
                                                  BD_LENGTH_MASK),
@@ -1899,7 +1899,7 @@ static void ucc_geth_memclean(struct ucc_geth_private *ugeth)
                        bd = ugeth->p_rx_bd_ring[i];
                        for (j = 0; j < ugeth->ug_info->bdRingLenRx[i]; j++) {
                                if (ugeth->rx_skbuff[i][j]) {
-                                       dma_unmap_single(&ugeth->dev->dev,
+                                       dma_unmap_single(ugeth->dev,
                                                in_be32(&((struct qe_bd __iomem *)bd)->buf),
                                                ugeth->ug_info->
                                                uf_info.max_rx_buf_length +
@@ -3070,7 +3070,7 @@ static int ucc_geth_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
        /* set up the buffer descriptor */
        out_be32(&((struct qe_bd __iomem *)bd)->buf,
-                     dma_map_single(&ugeth->dev->dev, skb->data,
+                     dma_map_single(ugeth->dev, skb->data,
                              skb->len, DMA_TO_DEVICE));
 
        /* printk(KERN_DEBUG"skb->data is 0x%x\n",skb->data); */
@@ -3126,7 +3126,7 @@ static int ucc_geth_rx(struct ucc_geth_private *ugeth, u8 rxQ, int rx_work_limit
 
        ugeth_vdbg("%s: IN", __func__);
 
-       dev = ugeth->dev;
+       dev = ugeth->ndev;
 
        /* collect received buffers */
        bd = ugeth->rxBd[rxQ];
@@ -3160,7 +3160,7 @@ static int ucc_geth_rx(struct ucc_geth_private *ugeth, u8 rxQ, int rx_work_limit
                        skb_put(skb, length);
 
                        /* Tell the skb what kind of packet this is */
-                       skb->protocol = eth_type_trans(skb, ugeth->dev);
+                       skb->protocol = eth_type_trans(skb, ugeth->ndev);
 
                        dev->stats.rx_bytes += length;
                        /* Send the packet up the stack */
@@ -3431,7 +3431,7 @@ static int ucc_geth_close(struct net_device *dev)
 
        ucc_geth_stop(ugeth);
 
-       free_irq(ugeth->ug_info->uf_info.irq, ugeth->dev);
+       free_irq(ugeth->ug_info->uf_info.irq, ugeth->ndev);
 
        netif_stop_queue(dev);
 
@@ -3445,7 +3445,7 @@ static void ucc_geth_timeout_work(struct work_struct *work)
        struct net_device *dev;
 
        ugeth = container_of(work, struct ucc_geth_private, timeout_work);
-       dev = ugeth->dev;
+       dev = ugeth->ndev;
 
        ugeth_vdbg("%s: IN", __func__);
 
@@ -3755,7 +3755,8 @@ static int ucc_geth_probe(struct of_device* ofdev, const struct of_device_id *ma
                memcpy(dev->dev_addr, mac_addr, 6);
 
        ugeth->ug_info = ug_info;
-       ugeth->dev = dev;
+       ugeth->dev = device;
+       ugeth->ndev = dev;
        ugeth->node = np;
 
        return 0;

diff --git a/drivers/net/ucc_geth.h b/drivers/net/ucc_geth.h
index 48fde5a..2f8ee7c 100644 (file)
--- a/drivers/net/ucc_geth.h
+++ b/drivers/net/ucc_geth.h
@@ -1128,7 +1128,8 @@ struct ucc_geth_info {
 struct ucc_geth_private {
        struct ucc_geth_info *ug_info;
        struct ucc_fast_private *uccf;
-       struct net_device *dev;
+       struct device *dev;
+       struct net_device *ndev;
        struct napi_struct napi;
        struct work_struct timeout_work;
        struct ucc_geth __iomem *ug_regs;