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scsi: qla2xxx: Remove extra register read 

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>
This commit is contained in:
Quinn Tran 2017-08-23 15:05:04 -07:00 committed by Martin K. Petersen
parent 1608cc4abf
commit dc62c3bea8
2 changed files with 0 additions and 10 deletions
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9
drivers/scsi/qla2xxx/qla_isr.c
View File

@ -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(&reg->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(&reg->hccr, HCCRX_CLR_RISC_INT);
RD_REG_DWORD_RELAXED(&reg->hccr);
}
out:
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return IRQ_HANDLED;

1
drivers/scsi/qla2xxx/qla_target.c
View File

@ -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