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[PATCH] mcs7830: Implement link state detection

 

 

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linux at rainbow-software

Jun 1, 2012, 1:29 PM

Post #1 of 2 (106 views)
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[PATCH] mcs7830: Implement link state detection

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 [at] rainbow-software>

--- a/drivers/net/usb/mcs7830.c
+++ b/drivers/net/usb/mcs7830.c
@@ -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,
};

--
Ondrej Zary
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davem at davemloft

Jun 2, 2012, 2:09 PM

Post #2 of 2 (92 views)
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Re: [PATCH] mcs7830: Implement link state detection [In reply to]

From: Ondrej Zary <linux [at] rainbow-software>
Date: Fri, 1 Jun 2012 22:29:08 +0200

> 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 [at] rainbow-software>

Applied.
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