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| author |   John Garry <john.garry@huawei.com> | 2016-09-06 23:36:11 +0800 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2016-09-14 12:54:17 -0400 |
| commit | e6c346f303d41b8799ea224d0faf1b2caa1c98db (patch) | |
| tree | 5ab81caef92f48c4960acefc2e66605b2e05eab4 /drivers/scsi/hisi_sas/hisi_sas.h | |
| parent | scsi: cxlflash: Fix context reference tracking on detach (diff) | |
| download | linux-dev-e6c346f303d41b8799ea224d0faf1b2caa1c98db.tar.xz linux-dev-e6c346f303d41b8799ea224d0faf1b2caa1c98db.zip | |
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 <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/hisi_sas/hisi_sas.h')
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h index ca55ec2974e0..9410335caf41 100644 --- a/drivers/scsi/hisi_sas/hisi_sas.h +++ b/drivers/scsi/hisi_sas/hisi_sas.h @@ -94,6 +94,7 @@ struct hisi_sas_port { struct hisi_sas_cq { struct hisi_hba *hisi_hba; + int rd_point; int id; }; |