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scsi: libcxgbi: add check for valid cxgbi_task_data

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In error case it is possible that ->cleanup_task() gets called without
calling ->alloc_pdu() in this case cxgbi_task_data is not valid, so add
a check for for valid cxgbi_task_data in cxgbi_cleanup_task().

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Varun Prakash 2017-07-23 20:01:32 +05:30 committed by Martin K. Petersen
parent 516b7db593
commit 5029271072
1 changed files with 7 additions and 0 deletions
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7
drivers/scsi/cxgbi/libcxgbi.c
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@ -2128,6 +2128,13 @@ void cxgbi_cleanup_task(struct iscsi_task *task)
struct iscsi_tcp_task *tcp_task = task->dd_data;
struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
if (!tcp_task || !tdata || (tcp_task->dd_data != tdata)) {
pr_info("task 0x%p,0x%p, tcp_task 0x%p, tdata 0x%p/0x%p.\n",
task, task->sc, tcp_task,
tcp_task ? tcp_task->dd_data : NULL, tdata);
return;
}
log_debug(1 << CXGBI_DBG_ISCSI,
"task 0x%p, skb 0x%p, itt 0x%x.\n",
task, tdata->skb, task->hdr_itt);