From: Alexei Potashnik Date: Tue, 14 Jul 2015 20:00:49 +0000 (-0400) Subject: qla2xxx: terminate exchange when command is aborted by LIO X-Git-Tag: v5.15~15261^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7359df25a53386dd33c223672bbd12cb49d0ce4f;p=platform%2Fkernel%2Flinux-starfive.git qla2xxx: terminate exchange when command is aborted by LIO The newly introduced aborted_task TFO callback has to terminate exchange with QLogic driver, since command is being deleted and no status will be queued to the driver at a later point. This patch also moves the burden of releasing one cmd refcount to the aborted_task handler. Changed iSCSI aborted_task logic to satisfy the above requirement. Cc: # v3.18+ Signed-off-by: Alexei Potashnik Acked-by: Quinn Tran Signed-off-by: Himanshu Madhani Signed-off-by: Nicholas Bellinger --- diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index b60f907..58651ec 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -1924,20 +1924,6 @@ static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, struct qla_hw_data *ha = vha->hw; struct se_cmd *se_cmd = &cmd->se_cmd; - if (unlikely(cmd->aborted)) { - ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, - "qla_target(%d): terminating exchange for aborted cmd=%p (se_cmd=%p, tag=%lld)", - vha->vp_idx, cmd, se_cmd, se_cmd->tag); - - cmd->state = QLA_TGT_STATE_ABORTED; - cmd->cmd_flags |= BIT_6; - - qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); - - /* !! At this point cmd could be already freed !! */ - return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED; - } - prm->cmd = cmd; prm->tgt = tgt; prm->rq_result = scsi_status; @@ -2524,9 +2510,6 @@ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, &full_req_cnt); if (unlikely(res != 0)) { - if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED) - return 0; - return res; } @@ -3092,6 +3075,24 @@ static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) } +void qlt_abort_cmd(struct qla_tgt_cmd *cmd) +{ + struct qla_tgt *tgt = cmd->tgt; + struct scsi_qla_host *vha = tgt->vha; + struct se_cmd *se_cmd = &cmd->se_cmd; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, + "qla_target(%d): terminating exchange for aborted cmd=%p " + "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd, + se_cmd->tag); + + cmd->state = QLA_TGT_STATE_ABORTED; + cmd->cmd_flags |= BIT_6; + + qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); +} +EXPORT_SYMBOL(qlt_abort_cmd); + void qlt_free_cmd(struct qla_tgt_cmd *cmd) { struct qla_tgt_sess *sess = cmd->sess; diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h index 2ceb60f..bca584a 100644 --- a/drivers/scsi/qla2xxx/qla_target.h +++ b/drivers/scsi/qla2xxx/qla_target.h @@ -808,13 +808,6 @@ int qla2x00_wait_for_hba_online(struct scsi_qla_host *); #define FC_TM_REJECT 4 #define FC_TM_FAILED 5 -/* - * Error code of qlt_pre_xmit_response() meaning that cmd's exchange was - * terminated, so no more actions is needed and success should be returned - * to target. - */ -#define QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED 0x1717 - #if (BITS_PER_LONG > 32) || defined(CONFIG_HIGHMEM64G) #define pci_dma_lo32(a) (a & 0xffffffff) #define pci_dma_hi32(a) ((((a) >> 16)>>16) & 0xffffffff) @@ -950,7 +943,6 @@ struct qla_tgt_cmd { unsigned int conf_compl_supported:1; unsigned int sg_mapped:1; unsigned int free_sg:1; - unsigned int aborted:1; /* Needed in case of SRR */ unsigned int write_data_transferred:1; unsigned int ctx_dsd_alloced:1; unsigned int q_full:1; @@ -1134,6 +1126,7 @@ static inline uint32_t sid_to_key(const uint8_t *s_id) extern void qlt_response_pkt_all_vps(struct scsi_qla_host *, response_t *); extern int qlt_rdy_to_xfer(struct qla_tgt_cmd *); extern int qlt_xmit_response(struct qla_tgt_cmd *, int, uint8_t); +extern void qlt_abort_cmd(struct qla_tgt_cmd *); extern void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *); extern void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *); extern void qlt_free_cmd(struct qla_tgt_cmd *cmd); diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c index 4e242c7..9224a06 100644 --- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c +++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c @@ -541,7 +541,6 @@ static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd) cmd->cmd_flags |= BIT_4; cmd->bufflen = se_cmd->data_length; cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); - cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED); cmd->sg_cnt = se_cmd->t_data_nents; cmd->sg = se_cmd->t_data_sg; @@ -570,7 +569,6 @@ static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd) cmd->sg_cnt = 0; cmd->offset = 0; cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); - cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED); if (cmd->cmd_flags & BIT_5) { pr_crit("Bit_5 already set for cmd = %p.\n", cmd); dump_stack(); @@ -635,14 +633,7 @@ static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd) { struct qla_tgt_cmd *cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd); - struct scsi_qla_host *vha = cmd->vha; - struct qla_hw_data *ha = vha->hw; - - if (!cmd->sg_mapped) - return; - - pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); - cmd->sg_mapped = 0; + qlt_abort_cmd(cmd); } static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,