| From | Jiri Slaby <> | Subject | [PATCH 3.12 019/123] iser-target: remove command with state ISTATE_REMOVE | Date | Wed, 28 Oct 2015 14:50:36 +0100 |
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From: Jenny Derzhavetz <jennyf@mellanox.com>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit a4c15cd957cbd728f685645de7a150df5912591a upstream.
As documented in iscsit_sequence_cmd: /* * Existing callers for iscsit_sequence_cmd() will silently * ignore commands with CMDSN_LOWER_THAN_EXP, so force this * return for CMDSN_MAXCMDSN_OVERRUN as well.. */
We need to silently finish a command when it's in ISTATE_REMOVE. This fixes an teardown hang we were seeing where a mis-behaved initiator (triggered by allocation error injections) sent us a cmdsn which was lower than expected.
Signed-off-by: Jenny Derzhavetz <jennyf@mellanox.com> Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- drivers/infiniband/ulp/isert/ib_isert.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 9a51eb2242a0..2e04d5253130 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -2541,9 +2541,16 @@ isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) static int isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) { - int ret; + struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); + int ret = 0; switch (state) { + case ISTATE_REMOVE: + spin_lock_bh(&conn->cmd_lock); + list_del_init(&cmd->i_conn_node); + spin_unlock_bh(&conn->cmd_lock); + isert_put_cmd(isert_cmd, true); + break; case ISTATE_SEND_NOPIN_WANT_RESPONSE: ret = isert_put_nopin(cmd, conn, false); break; -- 2.6.2
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