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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>
This commit is contained in:
Jitendra Bhivare 2016-12-13 15:55:56 +05:30 committed by Martin K. Petersen
parent 987132167f
commit faa0a22d54
1 changed files with 19 additions and 26 deletions
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45
drivers/scsi/be2iscsi/be_main.c
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@ -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);
/* 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;
}
aborted_io_task = aborted_task->dd_data;
if (!aborted_io_task->scsi_cmnd) {
/* raced or invalid command */
spin_unlock_bh(&session->frwd_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",