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mcs7830: Implement link state detection

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Add .status callback that detects link state changes.
Tested with MCS7832CV-AA chip (9710:7830, identified as rev.C by the driver).
Fixes https://bugzilla.kernel.org/show_bug.cgi?id=28532

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ondrej Zary 2012-06-01 10:29:08 +00:00 committed by David S. Miller
parent 6d7407bfba
commit b1ff4f96fd
1 changed files with 23 additions and 2 deletions
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25
drivers/net/usb/mcs7830.c
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@ -629,11 +629,31 @@ static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
return skb->len > 0;
}
static void mcs7830_status(struct usbnet *dev, struct urb *urb)
{
u8 *buf = urb->transfer_buffer;
bool link;
if (urb->actual_length < 16)
return;
link = !(buf[1] & 0x20);
if (netif_carrier_ok(dev->net) != link) {
if (link) {
netif_carrier_on(dev->net);
usbnet_defer_kevent(dev, EVENT_LINK_RESET);
} else
netif_carrier_off(dev->net);
netdev_dbg(dev->net, "Link Status is: %d\n", link);
}
}
static const struct driver_info moschip_info = {
.description = "MOSCHIP 7830/7832/7730 usb-NET adapter",
.bind = mcs7830_bind,
.rx_fixup = mcs7830_rx_fixup,
.flags = FLAG_ETHER,
.flags = FLAG_ETHER | FLAG_LINK_INTR,
.status = mcs7830_status,
.in = 1,
.out = 2,
};
@ -642,7 +662,8 @@ static const struct driver_info sitecom_info = {
.description = "Sitecom LN-30 usb-NET adapter",
.bind = mcs7830_bind,
.rx_fixup = mcs7830_rx_fixup,
.flags = FLAG_ETHER,
.flags = FLAG_ETHER | FLAG_LINK_INTR,
.status = mcs7830_status,
.in = 1,
.out = 2,
};