scsi: qla2xxx: edif: Fix I/O timeout due to over-subscription

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>

diff --git a/drivers/scsi/qla2xxx/qla_edif.c b/drivers/scsi/qla2xxx/qla_edif.c
index d31dd94..ca6d724 100644 (file)
--- 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 @@ queuing_error:
                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;