From: Quinn Tran <qutran@marvell.com>
Date: Wed, 8 Jun 2022 04:58:40 -0700
Subject: scsi: qla2xxx: edif: Fix I/O timeout due to over-subscription
Patch-mainline: v5.20-rc1
Git-commit: 63ab6cb582fad3757a03f466db671729b97f2df8
References: bsc#1201958

The current edif code does not keep track of FW IOCB resources.  This led
to IOCB queue full on error recovery (I/O timeout).  Make use of the
existing code that tracks IOCB resources to prevent over-subscription.

Link: https://lore.kernel.org/r/20220608115849.16693-2-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/scsi/qla2xxx/qla_edif.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/scsi/qla2xxx/qla_edif.c
+++ b/drivers/scsi/qla2xxx/qla_edif.c
@@ -2951,6 +2951,12 @@ qla28xx_start_scsi_edif(srb_t *sp)
 
 	tot_dsds = nseg;
 	req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
+
+	sp->iores.res_type = RESOURCE_INI;
+	sp->iores.iocb_cnt = req_cnt;
+	if (qla_get_iocbs(sp->qpair, &sp->iores))
+		goto queuing_error;
+
 	if (req->cnt < (req_cnt + 2)) {
 		cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
 		    rd_reg_dword(req->req_q_out);
@@ -3142,6 +3148,7 @@ qla28xx_start_scsi_edif(srb_t *sp)
 		mempool_free(sp->u.scmd.ct6_ctx, ha->ctx_mempool);
 		sp->u.scmd.ct6_ctx = NULL;
 	}
+	qla_put_iocbs(sp->qpair, &sp->iores);
 	spin_unlock_irqrestore(lock, flags);
 
 	return QLA_FUNCTION_FAILED;