[PATCH] macb: Add support of the netpoll API

Thomas Petazzoni
2009-04-15T13:58:12Z

macb: Add support of the netpoll API

With this patch in place, I'm successfully able to use the netconsole
mechanism with the Calao USB-A9263 board, which uses the AT91SAM9263
CPU, which in terms of Ethernet controller is supported by the macb
driver.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
drivers/net/macb.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

Index: linux/drivers/net/macb.c
===================================================================
--- linux.orig/drivers/net/macb.c
+++ linux/drivers/net/macb.c
@@ -616,6 +616,19 @@
return IRQ_HANDLED;
}

+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling receive - used by netconsole and other diagnostic tools
+ * to allow network i/o with interrupts disabled.
+ */
+static void macb_poll_controller(struct net_device *dev)
+{
+ disable_irq(dev->irq);
+ macb_interrupt(dev->irq, dev);
+ enable_irq(dev->irq);
+}
+#endif
+
static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct macb *bp = netdev_priv(dev);
@@ -1184,6 +1197,9 @@
dev->do_ioctl = macb_ioctl;
netif_napi_add(dev, &bp->napi, macb_poll, 64);
dev->ethtool_ops = &macb_ethtool_ops;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = macb_poll_controller;
+#endif

dev->base_addr = regs->start;

--
Thomas Petazzoni, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.