From: Quinn Tran <quinn.tran@cavium.com>
Date: Wed, 23 Aug 2017 15:05:04 -0700
Subject: scsi: qla2xxx: Remove extra register read
Patch-mainline: v4.14-rc1
Git-commit: dc62c3bea888f0fe2a472eb8264e186ca798180c
References: FATE#322910
Remove extra register read for each interrupt for performance
improvement.
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>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
---
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 c7f115755a52..d0ca1be537d7 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -3159,7 +3159,6 @@ 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) {
@@ -3173,19 +3172,11 @@ 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 25b4593cff05..7d3a2363fad3 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -6550,7 +6550,6 @@ 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
--
2.12.3