diff options
| author | Jitendra Bhivare <jitendra.bhivare@broadcom.com> | 2016-12-13 11:25:56 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-01-05 06:21:12 +0100 |
| commit | faa0a22d54230ae9658c419e495fc1a469e191f3 (patch) | |
| tree | 1c77f39cadc4ab81f9ab3762a7497e7ec4fe84e9 | |
| parent | scsi: be2iscsi: Fix for crash in beiscsi_eh_device_reset (diff) | |
| download | linux-faa0a22d54230ae9658c419e495fc1a469e191f3.tar.xz linux-faa0a22d54230ae9658c419e495fc1a469e191f3.zip | |
scsi: be2iscsi: Take iscsi_task ref in abort handler
Hold the reference of iscsi_task till invalidation completes.
This prevents use of ICD when invalidation of that ICD is being processed.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/be2iscsi/be_main.c | 45 |
1 files changed, 19 insertions, 26 deletions
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index 7feecc0b4903..260842a1f14e 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -218,47 +218,40 @@ static int beiscsi_slave_configure(struct scsi_device *sdev) static int beiscsi_eh_abort(struct scsi_cmnd *sc) { + struct iscsi_task *abrt_task = (struct iscsi_task *)sc->SCp.ptr; struct iscsi_cls_session *cls_session; - struct iscsi_task *aborted_task = (struct iscsi_task *)sc->SCp.ptr; - struct beiscsi_io_task *aborted_io_task; - struct iscsi_conn *conn; + struct beiscsi_io_task *abrt_io_task; struct beiscsi_conn *beiscsi_conn; - struct beiscsi_hba *phba; struct iscsi_session *session; struct invldt_cmd_tbl inv_tbl; - unsigned int cid; + struct beiscsi_hba *phba; + struct iscsi_conn *conn; int rc; cls_session = starget_to_session(scsi_target(sc->device)); session = cls_session->dd_data; - spin_lock_bh(&session->frwd_lock); - if (!aborted_task || !aborted_task->sc) { - /* we raced */ - spin_unlock_bh(&session->frwd_lock); - return SUCCESS; - } - - aborted_io_task = aborted_task->dd_data; - if (!aborted_io_task->scsi_cmnd) { - /* raced or invalid command */ - spin_unlock_bh(&session->frwd_lock); + /* check if we raced, task just got cleaned up under us */ + spin_lock_bh(&session->back_lock); + if (!abrt_task || !abrt_task->sc) { + spin_unlock_bh(&session->back_lock); return SUCCESS; } - spin_unlock_bh(&session->frwd_lock); - - conn = aborted_task->conn; + /* get a task ref till FW processes the req for the ICD used */ + __iscsi_get_task(abrt_task); + abrt_io_task = abrt_task->dd_data; + conn = abrt_task->conn; beiscsi_conn = conn->dd_data; phba = beiscsi_conn->phba; - /* Invalidate WRB Posted for this Task */ + /* mark WRB invalid which have been not processed by FW yet */ AMAP_SET_BITS(struct amap_iscsi_wrb, invld, - aborted_io_task->pwrb_handle->pwrb, - 1); - /* invalidate iocb */ - cid = beiscsi_conn->beiscsi_conn_cid; - inv_tbl.cid = cid; - inv_tbl.icd = aborted_io_task->psgl_handle->sgl_index; + abrt_io_task->pwrb_handle->pwrb, 1); + inv_tbl.cid = beiscsi_conn->beiscsi_conn_cid; + inv_tbl.icd = abrt_io_task->psgl_handle->sgl_index; + spin_unlock_bh(&session->back_lock); + rc = beiscsi_mgmt_invalidate_icds(phba, &inv_tbl, 1); + iscsi_put_task(abrt_task); if (rc) { beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_EH, "BM_%d : sc %p invalidation failed %d\n", |