scsi/libiscsi: Fix static checker warning on bh locking
Commit 659743b
"[SCSI] libiscsi: Reduce locking contention in fast path" introduced a
new smatch warning on libiscsi.c "iscsi_xmit_task() warn: inconsistent returns
bottom_half:: locked (1410 [(-61)]) unlocked (1425 [0], 1425 [s32min-(-1),1-s32max])",
which we can eliminate by using non bh locking on the nested spin_lock call.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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@ -1442,9 +1442,9 @@ static int iscsi_xmit_task(struct iscsi_conn *conn)
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conn->task = NULL;
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}
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/* regular RX path uses back_lock */
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spin_lock_bh(&conn->session->back_lock);
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spin_lock(&conn->session->back_lock);
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__iscsi_put_task(task);
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spin_unlock_bh(&conn->session->back_lock);
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spin_unlock(&conn->session->back_lock);
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return rc;
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}
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