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[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>
This commit is contained in:
Anirban Chakraborty 2009-06-03 09:55:19 -07:00 коммит произвёл James Bottomley
Родитель 94b3aa47ac
Коммит 59e0b8b088
2 изменённых файлов: 16 добавлений и 15 удалений
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13
drivers/scsi/qla2xxx/qla_attr.c
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@ -1595,6 +1595,7 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
struct qla_hw_data *ha = base_vha->hw; struct qla_hw_data *ha = base_vha->hw;
uint16_t options = 0; uint16_t options = 0;
int cnt; int cnt;
struct req_que *req = ha->req_q_map[0];
ret = qla24xx_vport_create_req_sanity_check(fc_vport); ret = qla24xx_vport_create_req_sanity_check(fc_vport);
if (ret) { if (ret) {
@ -1650,8 +1651,10 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
qla24xx_vport_disable(fc_vport, disable); qla24xx_vport_disable(fc_vport, disable);
ret = 0; if (ql2xmultique_tag) {
if (ql2xmaxqueues == 1 || ql2xmultique_tag || !ha->npiv_info) req = ha->req_q_map[1];
goto vport_queue;
} else if (ql2xmaxqueues == 1 || !ha->npiv_info)
goto vport_queue; goto vport_queue;
/* Create a request queue in QoS mode for the vport */ /* Create a request queue in QoS mode for the vport */
for (cnt = 0; cnt < ha->nvram_npiv_size; cnt++) { for (cnt = 0; cnt < ha->nvram_npiv_size; cnt++) {
@ -1669,14 +1672,16 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
qla_printk(KERN_WARNING, ha, qla_printk(KERN_WARNING, ha,
"Can't create request queue for vp_idx:%d\n", "Can't create request queue for vp_idx:%d\n",
vha->vp_idx); vha->vp_idx);
else else {
DEBUG2(qla_printk(KERN_INFO, ha, DEBUG2(qla_printk(KERN_INFO, ha,
"Request Que:%d (QoS: %d) created for vp_idx:%d\n", "Request Que:%d (QoS: %d) created for vp_idx:%d\n",
ret, qos, vha->vp_idx)); ret, qos, vha->vp_idx));
req = ha->req_q_map[ret];
}
} }
vport_queue: vport_queue:
vha->req = ha->req_q_map[ret]; vha->req = req;
return 0; return 0;
vport_create_failed_2: vport_create_failed_2:

16
drivers/scsi/qla2xxx/qla_iocb.c
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@ -15,7 +15,7 @@ static request_t *qla2x00_req_pkt(struct scsi_qla_host *, struct req_que *,
struct rsp_que *rsp); struct rsp_que *rsp);
static void qla2x00_isp_cmd(struct scsi_qla_host *, struct req_que *); static void qla2x00_isp_cmd(struct scsi_qla_host *, struct req_que *);
static void qla25xx_set_que(srb_t *, struct req_que **, struct rsp_que **); static void qla25xx_set_que(srb_t *, struct rsp_que **);
/** /**
* qla2x00_get_cmd_direction() - Determine control_flag data direction. * qla2x00_get_cmd_direction() - Determine control_flag data direction.
* @cmd: SCSI command * @cmd: SCSI command
@ -722,7 +722,8 @@ qla24xx_start_scsi(srb_t *sp)
/* Setup device pointers. */ /* Setup device pointers. */
ret = 0; ret = 0;
qla25xx_set_que(sp, &req, &rsp); qla25xx_set_que(sp, &rsp);
req = vha->req;
/* So we know we haven't pci_map'ed anything yet */ /* So we know we haven't pci_map'ed anything yet */
tot_dsds = 0; tot_dsds = 0;
@ -845,20 +846,15 @@ queuing_error:
return QLA_FUNCTION_FAILED; return QLA_FUNCTION_FAILED;
} }
static void qla25xx_set_que(srb_t *sp, struct req_que **req, static void qla25xx_set_que(srb_t *sp, struct rsp_que **rsp)
struct rsp_que **rsp)
{ {
struct scsi_cmnd *cmd = sp->cmd; struct scsi_cmnd *cmd = sp->cmd;
struct scsi_qla_host *vha = sp->fcport->vha;
struct qla_hw_data *ha = sp->fcport->vha->hw; struct qla_hw_data *ha = sp->fcport->vha->hw;
int affinity = cmd->request->cpu; int affinity = cmd->request->cpu;
if (ql2xmultique_tag && affinity >= 0 && if (ql2xmultique_tag && affinity >= 0 &&
affinity < ha->max_rsp_queues - 1) { affinity < ha->max_rsp_queues - 1)
*rsp = ha->rsp_q_map[affinity + 1]; *rsp = ha->rsp_q_map[affinity + 1];
*req = ha->req_q_map[1]; else
} else {
*req = vha->req;
*rsp = ha->rsp_q_map[0]; *rsp = ha->rsp_q_map[0];
} }
}