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| author | David Gibson <david@gibson.dropbear.id.au> | 2012-09-12 16:57:21 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2012-10-04 15:54:18 +0200 |
| commit | 3fe719f467530b7c8ac0797881ff4b66d1357c18 (patch) | |
| tree | 63f071414d9bdfccebb3fab39418d498e865ef2b /audio | |
| parent | 53724ee565565f69560dbe17553bede8c0169379 (diff) | |
pseries: Fix semantics of RTAS int-on, int-off and set-xive functions
Currently the ibm,int-on and ibm,int-off RTAS functions are implemented as
no-ops. This is because when implemented as specified in PAPR they caused
Linux (which calls both int-on/off and set-xive) to end up with interrupts
masked when they should not be. Since Linux's set-xive calls make the
int-on/off calls redundant, making them nops worked around the problem.
In fact, the problem was caused because there was a subtle bug in set-xive,
PAPR specifies that as well as updating the current priority, it also needs
to update the saved priority used by int-on/off. With this bug fixed the
problem goes away. This patch implements this more correct fix.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'audio')
0 files changed, 0 insertions, 0 deletions