tree b7019a603013ccdeb176349a5b0e315111b2e538
parent 46759a7c132648d79121518d2f7c34edc3f0cf58
author Benjamin Herrenschmidt <benh@kernel.crashing.org> 1263145902 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1263522373 +1100

serial/pmac_zilog: Workaround problem due to interrupt on closed port

It seems that in qemu, we can see an interrupt in R3 despite the
fact that it's masked in W1. The chip doesn't actually issue an
interrupt, but we can "see" it when taking an interrupt for the
other channel. This may be a qemu bug ... or not, so let's be
safe and avoid calling into the UART layer when that happens which
woulc cause a crash.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Rob Landley <rob@landley.net>