tree ac23c82f0739ad7521b531f570305d2a306c7651
parent 66dc3304f3875ea85c630a57a88ecf79032890c4
author Michael Ellerman <michael@ellerman.id.au> 1246810132 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1250727142 +1000

powerpc/mpic: Fix MPIC_BROKEN_REGREAD on non broken MPICs

The workaround enabled by CONFIG_MPIC_BROKEN_REGREAD does not work
on non-broken MPICs. The symptom is no interrupts being received.

The fix is twofold. Firstly the code was broken for multiple isus,
we need to index into the shadow array with the src_no, not the idx.
Secondly, we always do the read, but only use the VECPRI_MASK and
VECPRI_ACTIVITY bits from the hardware, the rest of "val" comes
from the shadow.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>