From dc62c3bea888f0fe2a472eb8264e186ca798180c Mon Sep 17 00:00:00 2001 From: Quinn Tran Date: Wed, 23 Aug 2017 15:05:04 -0700 Subject: [PATCH] scsi: qla2xxx: Remove extra register read Remove extra register read for each interrupt for performance improvement. Signed-off-by: Quinn Tran Signed-off-by: Himanshu Madhani Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_isr.c | 9 --------- drivers/scsi/qla2xxx/qla_target.c | 1 - 2 files changed, 10 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index c6c0661..df8a7f3 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -3157,7 +3157,6 @@ qla24xx_msix_rsp_q(int irq, void *dev_id) struct device_reg_24xx __iomem *reg; struct scsi_qla_host *vha; unsigned long flags; - uint32_t stat = 0; rsp = (struct rsp_que *) dev_id; if (!rsp) { @@ -3171,19 +3170,11 @@ qla24xx_msix_rsp_q(int irq, void *dev_id) spin_lock_irqsave(&ha->hardware_lock, flags); vha = pci_get_drvdata(ha->pdev); - /* - * Use host_status register to check to PCI disconnection before we - * we process the response queue. - */ - stat = RD_REG_DWORD(®->host_status); - if (qla2x00_check_reg32_for_disconnect(vha, stat)) - goto out; qla24xx_process_response_queue(vha, rsp); if (!ha->flags.disable_msix_handshake) { WRT_REG_DWORD(®->hccr, HCCRX_CLR_RISC_INT); RD_REG_DWORD_RELAXED(®->hccr); } -out: spin_unlock_irqrestore(&ha->hardware_lock, flags); return IRQ_HANDLED; diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 4e2a647..3bcfbee 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -6530,7 +6530,6 @@ qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked) /* Adjust ring index */ WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); - RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha)); } void -- 2.7.4