From: Komuro <komurojun-mbn@nifty.com>
Date: Tue, 27 May 2008 21:34:24 +0900

quoted text
> I think the transmit timeout indicates 
> that the cable is not connected or the irq is conflict.

The MAC of the chip transmits and ACKs the packet in the hardware even
if the link is down.  The packet is simply dropped.

Also, when the link goes down, the driver should mark the device as
such.  In such a state, the generic networking does not pass new
packets to the driver.

Therefore, transmit timeouts in this case are a hardware
or driver error.

If there is an IRQ issue, that is an error that'd we would like to
have as much information as possible to diagnose.  So the warning is
still entirely appropriate.

I sense that you are seeing this warning triggered, and if so I
would suggest that you investigate it fully as it should not be
happening under normal circumstances.
--
unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/