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authorrusty <rusty@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652>2014-02-26 04:21:14 +0000
committerrusty <rusty@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652>2014-02-26 04:21:14 +0000
commit2a75834b5fa8813c3fa11ea41ff581463a030092 (patch)
tree785ff831bb2eb29fe8d3e27d83b577d98f1410d5 /feedback/5.txt
parentce25e7bd05400bc7620c19a2fede3a86c6f5e39b (diff)
ccw: Fix requirements for processing adapter interrupts.
We currently mandate that the driver clears the summary indicator before processing the queue indicator; this is bogus, as the requirement for interrupt avoidance is rather that the driver unsets the summary indicator before before it stops looking at the queue indicator. In fact, the best way to get a race-free implementation of the interrupt handler is to process the queue indicators twice; let's add a recommondation to do that. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Rusty Russell <rusty@au1.ibm.com> (merged) git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@281 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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