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authorNicholas Bellinger <nab@linux-iscsi.org>2016-12-06 22:45:46 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2017-02-08 07:47:19 -0800
commitc54eeffbe9338fa982dc853d816fda9202a13b5a (patch)
treed2ae7722aa231eb23c2a89fcaf430461f9eed320 /include/soc/nps
parent0583c261e6325f392c1f7a1b9112e31298e1a4bd (diff)
target: Fix early transport_generic_handle_tmr abort scenario
This patch fixes a bug where incoming task management requests can be explicitly aborted during an active LUN_RESET, but who's struct work_struct are canceled in-flight before execution. This occurs when core_tmr_drain_tmr_list() invokes cancel_work_sync() for the incoming se_tmr_req->task_cmd->work, resulting in cmd->work for target_tmr_work() never getting invoked and the aborted TMR waiting indefinately within transport_wait_for_tasks(). To address this case, perform a CMD_T_ABORTED check early in transport_generic_handle_tmr(), and invoke the normal path via transport_cmd_check_stop_to_fabric() to complete any TMR kthreads blocked waiting for CMD_T_STOP in transport_wait_for_tasks(). Also, move the TRANSPORT_ISTATE_PROCESSING assignment earlier into transport_generic_handle_tmr() so the existing check in core_tmr_drain_tmr_list() avoids attempting abort the incoming se_tmr_req->task_cmd->work if it has already been queued into se_device->tmr_wq. Reported-by: Rob Millner <rlm@daterainc.com> Tested-by: Rob Millner <rlm@daterainc.com> Cc: Rob Millner <rlm@daterainc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: stable@vger.kernel.org # 3.14+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/soc/nps')
0 files changed, 0 insertions, 0 deletions