diff options
| author | Quinn Tran <quinn.tran@cavium.com> | 2017-06-02 09:12:07 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-06-12 20:48:08 -0400 |
| commit | d63b328f0904a1e04368de5cf1d27c0f2d0bc554 (patch) | |
| tree | 2009f839903f7047f299932f9a9cce5014999dd9 | |
| parent | ba68a63561deb328e1ad0940cea0932e8962ef0e (diff) | |
| download | linux-d63b328f0904a1e04368de5cf1d27c0f2d0bc554.tar.bz2 | |
scsi: qla2xxx: Remove extra register read
Remove extra register read in each interrupt processing to improve
performance.
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_iocb.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_target.c | 11 |
2 files changed, 5 insertions, 10 deletions
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c index ea027f6a7fd4..8404f17f3c6c 100644 --- a/drivers/scsi/qla2xxx/qla_iocb.c +++ b/drivers/scsi/qla2xxx/qla_iocb.c @@ -464,7 +464,9 @@ qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req) req->ring_ptr++; /* Set chip new ring index. */ - if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) { + if (ha->mqenable || IS_QLA27XX(ha)) { + WRT_REG_DWORD(req->req_q_in, req->ring_index); + } else if (IS_QLA83XX(ha)) { WRT_REG_DWORD(req->req_q_in, req->ring_index); RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr); } else if (IS_QLAFX00(ha)) { diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index a8e57072019b..88eea4d34487 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -2252,11 +2252,10 @@ static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, uint32_t req_cnt) { - uint32_t cnt, cnt_in; + uint32_t cnt; if (vha->req->cnt < (req_cnt + 2)) { cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out); - cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in); if (vha->req->ring_index < cnt) vha->req->cnt = cnt - vha->req->ring_index; @@ -2264,14 +2263,8 @@ static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, vha->req->cnt = vha->req->length - (vha->req->ring_index - cnt); - if (unlikely(vha->req->cnt < (req_cnt + 2))) { - ql_dbg(ql_dbg_io, vha, 0x305a, - "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n", - vha->vp_idx, vha->req->ring_index, - vha->req->cnt, req_cnt, cnt, cnt_in, - vha->req->length); + if (unlikely(vha->req->cnt < (req_cnt + 2))) return -EAGAIN; - } } vha->req->cnt -= req_cnt; |