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
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -222,10 +222,10 @@
(((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 @@
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 @@
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 @@
/* 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 @@
ugeth_vdbg("%s: IN", __func__);
- dev = ugeth->dev;
+ dev = ugeth->ndev;
/* collect received buffers */
bd = ugeth->rxBd[rxQ];
@@ -3160,7 +3160,7 @@
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 @@
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 @@
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 @@
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
--- a/drivers/net/ucc_geth.h
+++ b/drivers/net/ucc_geth.h
@@ -1128,7 +1128,8 @@
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;