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Commit 1586e07a authored by Quinn Tran's avatar Quinn Tran Committed by Martin K. Petersen
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scsi: qla2xxx: Use shadow register for ISP27XX 



For ISP27XX, use shadow register to read FW provided REQQ's consumer
index. The shadow register is dma'ed by firmware.

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 d2b292c3

drivers/scsi/qla2xxx/qla_iocb.c

+3 −1
Original line number Diff line number Diff line
@@ -2158,7 +2158,9 @@ __qla2x00_alloc_iocbs(struct qla_qpair *qpair, srb_t *sp) 
skip_cmd_array:

	/* Check for room on request queue. */

	if (req->cnt < req_cnt + 2) {

		if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha))

		if (qpair->use_shadow_reg)

			cnt = *req->out_ptr;

		else if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha))

			cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);

		else if (IS_P3P_TYPE(ha))

			cnt = RD_REG_DWORD(&reg->isp82.req_q_out);