[SCSI] qla2xxx: Correct NULL pointer bug in cpu affinity mode.
This patch fixes a NULL pointer bug that occurs when IO is being carried out on a vport for which the cpu affinity mode is turned on. Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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94b3aa47ac
Коммит
59e0b8b088
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@ -1595,6 +1595,7 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
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struct qla_hw_data *ha = base_vha->hw;
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uint16_t options = 0;
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int cnt;
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struct req_que *req = ha->req_q_map[0];
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ret = qla24xx_vport_create_req_sanity_check(fc_vport);
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if (ret) {
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@ -1650,14 +1651,16 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
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qla24xx_vport_disable(fc_vport, disable);
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ret = 0;
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if (ql2xmaxqueues == 1 || ql2xmultique_tag || !ha->npiv_info)
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if (ql2xmultique_tag) {
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req = ha->req_q_map[1];
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goto vport_queue;
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} else if (ql2xmaxqueues == 1 || !ha->npiv_info)
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goto vport_queue;
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/* Create a request queue in QoS mode for the vport */
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for (cnt = 0; cnt < ha->nvram_npiv_size; cnt++) {
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if (memcmp(ha->npiv_info[cnt].port_name, vha->port_name, 8) == 0
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&& memcmp(ha->npiv_info[cnt].node_name, vha->node_name,
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8) == 0) {
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8) == 0) {
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qos = ha->npiv_info[cnt].q_qos;
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break;
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}
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@ -1669,14 +1672,16 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
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qla_printk(KERN_WARNING, ha,
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"Can't create request queue for vp_idx:%d\n",
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vha->vp_idx);
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else
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else {
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DEBUG2(qla_printk(KERN_INFO, ha,
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"Request Que:%d (QoS: %d) created for vp_idx:%d\n",
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ret, qos, vha->vp_idx));
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req = ha->req_q_map[ret];
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}
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}
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vport_queue:
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vha->req = ha->req_q_map[ret];
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vha->req = req;
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return 0;
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vport_create_failed_2:
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@ -15,7 +15,7 @@ static request_t *qla2x00_req_pkt(struct scsi_qla_host *, struct req_que *,
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struct rsp_que *rsp);
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static void qla2x00_isp_cmd(struct scsi_qla_host *, struct req_que *);
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static void qla25xx_set_que(srb_t *, struct req_que **, struct rsp_que **);
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static void qla25xx_set_que(srb_t *, struct rsp_que **);
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/**
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* qla2x00_get_cmd_direction() - Determine control_flag data direction.
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* @cmd: SCSI command
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@ -722,7 +722,8 @@ qla24xx_start_scsi(srb_t *sp)
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/* Setup device pointers. */
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ret = 0;
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qla25xx_set_que(sp, &req, &rsp);
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qla25xx_set_que(sp, &rsp);
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req = vha->req;
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/* So we know we haven't pci_map'ed anything yet */
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tot_dsds = 0;
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@ -845,20 +846,15 @@ queuing_error:
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return QLA_FUNCTION_FAILED;
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}
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static void qla25xx_set_que(srb_t *sp, struct req_que **req,
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struct rsp_que **rsp)
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static void qla25xx_set_que(srb_t *sp, struct rsp_que **rsp)
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{
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struct scsi_cmnd *cmd = sp->cmd;
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struct scsi_qla_host *vha = sp->fcport->vha;
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struct qla_hw_data *ha = sp->fcport->vha->hw;
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int affinity = cmd->request->cpu;
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if (ql2xmultique_tag && affinity >= 0 &&
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affinity < ha->max_rsp_queues - 1) {
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affinity < ha->max_rsp_queues - 1)
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*rsp = ha->rsp_q_map[affinity + 1];
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*req = ha->req_q_map[1];
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} else {
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*req = vha->req;
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else
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*rsp = ha->rsp_q_map[0];
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}
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}
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