Commit 657ed8a8 authored by Daniel Wagner's avatar Daniel Wagner Committed by Martin K. Petersen
Browse files

scsi: qla2xxx: Do not consume srb greedily 

qla2xx_process_get_sp_from_handle() will clear the slot in which the
current srb is stored. As a result it can't be used in
qla24xx_process_mbx_iocb_response() to check for consistency and later
again in qla24xx_mbx_iocb_entry().

Move the consistency check directly into qla24xx_mbx_iocb_entry() and avoid
the double call or any open coding of the
qla2xx_process_get_sp_from_handle() functionality.

Link: https://lore.kernel.org/r/20200929073802.18770-1-dwagner@suse.de


Fixes: 31a3271f ("scsi: qla2xxx: Handle incorrect entry_type entries")
Reviewed-by: default avatarArun Easi <aeasi@marvell.com>
Reviewed-by: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: default avatarDaniel Wagner <dwagner@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent b9947187

drivers/scsi/qla2xxx/qla_isr.c

+15 −27
Original line number Diff line number Diff line
@@ -1839,6 +1839,7 @@ qla24xx_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req, 
    struct mbx_24xx_entry *pkt)

{

	const char func[] = "MBX-IOCB2";

	struct qla_hw_data *ha = vha->hw;

	srb_t *sp;

	struct srb_iocb *si;

	u16 sz, i;
@@ -1848,6 +1849,18 @@ qla24xx_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req, 
	if (!sp)

		return;



	if (sp->type == SRB_SCSI_CMD ||

	    sp->type == SRB_NVME_CMD ||

	    sp->type == SRB_TM_CMD) {

		ql_log(ql_log_warn, vha, 0x509d,

			"Inconsistent event entry type %d\n", sp->type);

		if (IS_P3P_TYPE(ha))

			set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);

		else

			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);

		return;

	}



	si = &sp->u.iocb_cmd;

	sz = min(ARRAY_SIZE(pkt->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.in_mb));
@@ -3400,32 +3413,6 @@ void qla24xx_nvme_ls4_iocb(struct scsi_qla_host *vha, 
	sp->done(sp, comp_status);

}



static void qla24xx_process_mbx_iocb_response(struct scsi_qla_host *vha,

	struct rsp_que *rsp, struct sts_entry_24xx *pkt)

{

	struct qla_hw_data *ha = vha->hw;

	srb_t *sp;

	static const char func[] = "MBX-IOCB2";



	sp = qla2x00_get_sp_from_handle(vha, func, rsp->req, pkt);

	if (!sp)

		return;



	if (sp->type == SRB_SCSI_CMD ||

	    sp->type == SRB_NVME_CMD ||

	    sp->type == SRB_TM_CMD) {

		ql_log(ql_log_warn, vha, 0x509d,

			"Inconsistent event entry type %d\n", sp->type);

		if (IS_P3P_TYPE(ha))

			set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);

		else

			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);

		return;

	}



	qla24xx_mbx_iocb_entry(vha, rsp->req, (struct mbx_24xx_entry *)pkt);

}



/**

 * qla24xx_process_response_queue() - Process response queue entries.

 * @vha: SCSI driver HA context
@@ -3535,7 +3522,8 @@ process_err: 
			    (struct abort_entry_24xx *)pkt);

			break;

		case MBX_IOCB_TYPE:

			qla24xx_process_mbx_iocb_response(vha, rsp, pkt);

			qla24xx_mbx_iocb_entry(vha, rsp->req,

			    (struct mbx_24xx_entry *)pkt);

			break;

		case VP_CTRL_IOCB_TYPE:

			qla_ctrlvp_completed(vha, rsp->req,

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