Getting the same alert twice in a row is legal and normal,
especially on a fast device (like running in qemu). Kind of
like interrupts. So don't report duplicate alerts, and deliver
them normally.
[JD: Fixed subject]
Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>