tree afd7b8a15aa6b9bccc728ffe61e1d9d587bc5b6c
parent ddc80bd781590ef6eb8ce30a0f3ac88c5599e41c
author Jay Lubomirski <jaylubo@motorola.com> 1182978609 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1183055909 -0700

serial: clear proper MPSC interrupt cause bits

The interrupt clearing code in mpsc_sdma_intr_ack() mistakenly clears the
interrupt for both controllers instead of just the one its supposed to.
This can result in the other controller appearing to hang because its
interrupt was effectively lost.

So, don't clear the interrupt cause bits for both MPSC controllers when
clearing the interrupt for one of them.  Just clear the one that is
supposed to be cleared.

Signed-off-by: Jay Lubomirski <jaylubo@motorola.com>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>