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net/usb/r8152: make sure the USB buffer is DMA-able

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Allocate the required memory before calling usb_control_msg. And
the additional memory copy is necessary.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
hayeswang 2013-07-31 17:21:25 +08:00 committed by David S. Miller
parent 543ae7f9c4
commit 31787f5398
1 changed files with 35 additions and 25 deletions
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60
drivers/net/usb/r8152.c
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@ -344,17 +344,41 @@ static const int multicast_filter_limit = 32;
static
int get_registers(struct r8152 *tp, u16 value, u16 index, u16 size, void *data)
{
return usb_control_msg(tp->udev, usb_rcvctrlpipe(tp->udev, 0),
int ret;
void *tmp;
tmp = kmalloc(size, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
ret = usb_control_msg(tp->udev, usb_rcvctrlpipe(tp->udev, 0),
RTL8152_REQ_GET_REGS, RTL8152_REQT_READ,
value, index, data, size, 500);
value, index, tmp, size, 500);
memcpy(data, tmp, size);
kfree(tmp);
return ret;
}
static
int set_registers(struct r8152 *tp, u16 value, u16 index, u16 size, void *data)
{
return usb_control_msg(tp->udev, usb_sndctrlpipe(tp->udev, 0),
int ret;
void *tmp;
tmp = kmalloc(size, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
memcpy(tmp, data, size);
ret = usb_control_msg(tp->udev, usb_sndctrlpipe(tp->udev, 0),
RTL8152_REQ_SET_REGS, RTL8152_REQT_WRITE,
value, index, data, size, 500);
value, index, tmp, size, 500);
kfree(tmp);
return ret;
}
static int generic_ocp_read(struct r8152 *tp, u16 index, u16 size,
@ -685,21 +709,14 @@ static void ocp_reg_write(struct r8152 *tp, u16 addr, u16 data)
static inline void set_ethernet_addr(struct r8152 *tp)
{
struct net_device *dev = tp->netdev;
u8 *node_id;
u8 node_id[8] = {0};
node_id = kmalloc(sizeof(u8) * 8, GFP_KERNEL);
if (!node_id) {
netif_err(tp, probe, dev, "out of memory");
return;
}
if (pla_ocp_read(tp, PLA_IDR, sizeof(u8) * 8, node_id) < 0)
if (pla_ocp_read(tp, PLA_IDR, sizeof(node_id), node_id) < 0)
netif_notice(tp, probe, dev, "inet addr fail\n");
else {
memcpy(dev->dev_addr, node_id, dev->addr_len);
memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
}
kfree(node_id);
}
static int rtl8152_set_mac_address(struct net_device *netdev, void *p)
@ -882,15 +899,10 @@ static void rtl8152_set_rx_mode(struct net_device *netdev)
static void _rtl8152_set_rx_mode(struct net_device *netdev)
{
struct r8152 *tp = netdev_priv(netdev);
u32 tmp, *mc_filter; /* Multicast hash filter */
u32 mc_filter[2]; /* Multicast hash filter */
__le32 tmp[2];
u32 ocp_data;
mc_filter = kmalloc(sizeof(u32) * 2, GFP_KERNEL);
if (!mc_filter) {
netif_err(tp, link, netdev, "out of memory");
return;
}
clear_bit(RTL8152_SET_RX_MODE, &tp->flags);
netif_stop_queue(netdev);
ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_RCR);
@ -918,14 +930,12 @@ static void _rtl8152_set_rx_mode(struct net_device *netdev)
}
}
tmp = mc_filter[0];
mc_filter[0] = __cpu_to_le32(swab32(mc_filter[1]));
mc_filter[1] = __cpu_to_le32(swab32(tmp));
tmp[0] = __cpu_to_le32(swab32(mc_filter[1]));
tmp[1] = __cpu_to_le32(swab32(mc_filter[0]));
pla_ocp_write(tp, PLA_MAR, BYTE_EN_DWORD, sizeof(u32) * 2, mc_filter);
pla_ocp_write(tp, PLA_MAR, BYTE_EN_DWORD, sizeof(tmp), tmp);
ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RCR, ocp_data);
netif_wake_queue(netdev);
kfree(mc_filter);
}
static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb,