ixgbe: Update watchdog thread to accomodate longerlink_up events

This patch updates the link_up code and watchdog thread so that link_up
doesn't cause stack overflows due to long waits in interrupt context.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index 90b5383..2b827a6 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -309,6 +309,12 @@
 	u64 lro_aggregated;
 	u64 lro_flushed;
 	u64 lro_no_desc;
+
+	u32 link_speed;
+	bool link_up;
+	unsigned long link_check_timeout;
+
+	struct work_struct watchdog_task;
 };
 
 enum ixbge_state_t {