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(parent: e6c346f) | patch
scsi: hisi_sas: save delivery queue write pointer
authorJohn Garry <john.garry@huawei.com>
Tue, 6 Sep 2016 15:36:12 +0000 (23:36 +0800)
committerMartin K. Petersen <martin.petersen@oracle.com>
Wed, 14 Sep 2016 16:54:17 +0000 (12:54 -0400)
commit4fde02ad66dc9ceb0b55daca21ef33b43df30ded
tree4c707c92f64c6c18bfaa4dd62c6e24f70fc0abbdtree | snapshot
parente6c346f303d41b8799ea224d0faf1b2caa1c98dbcommit | diff
scsi: hisi_sas: save delivery queue write pointer

Optimise by saving an avoidable read in the get_free_slot function.  The
delivery queue write pointer will only be updated by software, so don't
bother re-reading what was already written in the previous call to
start_delivery function.

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>
drivers/scsi/hisi_sas/hisi_sas.h diff | blob | history
drivers/scsi/hisi_sas/hisi_sas_main.c diff | blob | history
drivers/scsi/hisi_sas/hisi_sas_v1_hw.c diff | blob | history
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c diff | blob | history
Domain: System / Kernel;