Hello Atul Deshmukh,
This is a semi-automatic email about new static checker warnings.
The patch 7ec0effd30bb: "[SCSI] qla2xxx: Add support for ISP8044."
from Aug 27, 2013, leads to the following Smatch complaint:
drivers/scsi/qla2xxx/qla_os.c:2958 qla2x00_probe_one()
error: we previously assumed 'base_vha' could be null (see line 2628)
drivers/scsi/qla2xxx/qla_os.c
2627 base_vha = qla2x00_create_host(sht, ha);
2628 if (!base_vha) {
^^^^^^^^^
Existing check.
2629 ret = -ENOMEM;
2630 qla2x00_mem_free(ha);
2631 qla2x00_free_req_que(ha, req);
2632 qla2x00_free_rsp_que(ha, rsp);
2633 goto probe_hw_failed;
2634 }
[ snip ]
2935 probe_failed:
2936 if (base_vha->timer_active)
2937 qla2x00_stop_timer(base_vha);
2938 base_vha->flags.online = 0;
2939 if (ha->dpc_thread) {
2940 struct task_struct *t = ha->dpc_thread;
2941
2942 ha->dpc_thread = NULL;
2943 kthread_stop(t);
2944 }
2945
2946 qla2x00_free_device(base_vha);
2947
2948 scsi_host_put(base_vha->host);
2949
2950 probe_hw_failed:
2951 if (IS_QLA82XX(ha)) {
2952 qla82xx_idc_lock(ha);
2953 qla82xx_clear_drv_active(ha);
2954 qla82xx_idc_unlock(ha);
2955 }
2956 if (IS_QLA8044(ha)) {
2957 qla8044_idc_lock(ha);
2958 qla8044_clear_drv_active(base_vha);
^^^^^^^^
Patch introduces new unchecked dereference.
2959 qla8044_idc_unlock(ha);
2960 }
regards,
dan carpenter
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