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authorJohn Garry <[email protected]>2016-09-06 23:36:11 +0800
committerMartin K. Petersen <[email protected]>2016-09-14 12:54:17 -0400
commite6c346f303d41b8799ea224d0faf1b2caa1c98db (patch)
tree5ab81caef92f48c4960acefc2e66605b2e05eab4 /tools/perf/scripts/python/check-perf-trace.py
parentc4a11827b760ef8dcda26b5731d072b1d8fb7c81 (diff)
scsi: hisi_sas: save completion queue read pointer
Optimise by saving an avoidable read in the cq interrupt. The queue read pointer will only be updated by software, so don't bother re-reading what was already written in the previous interrupt. Signed-off-by: John Garry <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]>
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