Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit dc62c3be authored by Quinn Tran's avatar Quinn Tran Committed by Martin K. Petersen
Browse files

scsi: qla2xxx: Remove extra register read 



Remove extra register read for each interrupt for performance
improvement.

Signed-off-by: default avatarQuinn Tran <quinn.tran@cavium.com>
Signed-off-by: default avatarHimanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 1608cc4a

drivers/scsi/qla2xxx/qla_isr.c

+0 −9
Original line number Diff line number Diff line
@@ -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;

drivers/scsi/qla2xxx/qla_target.c

+0 −1
Original line number Diff line number Diff line
@@ -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