linux-kernel - linux-next: manual merge of the target-updates tree with the scsi tree

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Date:   Mon, 3 Jul 2017 15:56:58 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     "Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
        James Bottomley <James.Bottomley@...senPartnership.com>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Quinn Tran <quinn.tran@...ium.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: linux-next: manual merge of the target-updates tree with the scsi
 tree

Hi Nicholas,

Today's linux-next merge of the target-updates tree got a conflict in:

  drivers/scsi/qla2xxx/qla_target.c

between commit:

  c5419e2618b9 ("scsi: qla2xxx: Combine Active command arrays.")

from the scsi tree and commit:

  bc1bb269ef7b ("qla2xxx: Fix incorrect tcm_qla2xxx_free_cmd use during TMR ABORT")

from the target-updates tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/scsi/qla2xxx/qla_target.c
index 2a0173e5d10e,8f8ece900801..000000000000
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@@ -1874,36 -1847,13 +1874,14 @@@ static int __qlt_24xx_handle_abts(struc
  	struct abts_recv_from_24xx *abts, struct fc_port *sess)
  {
  	struct qla_hw_data *ha = vha->hw;
- 	struct se_session *se_sess = sess->se_sess;
  	struct qla_tgt_mgmt_cmd *mcmd;
- 	struct qla_tgt_cmd *cmd;
- 	struct se_cmd *se_cmd;
  	int rc;
- 	bool found_lun = false;
- 	unsigned long flags;
  
- 	spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
- 	list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
- 		if (se_cmd->tag == abts->exchange_addr_to_abort) {
- 			found_lun = true;
- 			break;
- 		}
- 	}
- 	spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
- 
- 	/* cmd not in LIO lists, look in qla list */
- 	if (!found_lun) {
- 		if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
- 			/* send TASK_ABORT response immediately */
- 			qlt_24xx_send_abts_resp(ha->base_qpair, abts,
- 			    FCP_TMF_CMPL, false);
- 			return 0;
- 		} else {
- 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
- 			    "unable to find cmd in driver or LIO for tag 0x%x\n",
- 			    abts->exchange_addr_to_abort);
- 			return -ENOENT;
- 		}
+ 	if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
+ 		/* send TASK_ABORT response immediately */
 -		qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
++		qlt_24xx_send_abts_resp(ha->base_qpair, abts,
++			FCP_TMF_CMPL, false);
+ 		return 0;
  	}
  
  	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
@@@ -1919,14 -1869,16 +1897,18 @@@
  	}
  	memset(mcmd, 0, sizeof(*mcmd));
  
 +	cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
  	mcmd->sess = sess;
  	memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
 -	mcmd->reset_count = vha->hw->chip_reset;
 +	mcmd->reset_count = ha->base_qpair->chip_reset;
  	mcmd->tmr_func = QLA_TGT_ABTS;
 +	mcmd->qpair = ha->base_qpair;
  
- 	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, cmd->unpacked_lun, mcmd->tmr_func,
+ 	/*
+ 	 * LUN is looked up by target-core internally based on the passed
+ 	 * abts->exchange_addr_to_abort tag.
+ 	 */
+ 	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, mcmd->tmr_func,
  	    abts->exchange_addr_to_abort);
  	if (rc != 0) {
  		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
@@@ -4188,7 -4078,9 +4170,10 @@@ static struct qla_tgt_cmd *qlt_get_tag(
  
  	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
  	memset(cmd, 0, sizeof(struct qla_tgt_cmd));
 +	cmd->cmd_type = TYPE_TGT_CMD;
+ 
+ 	init_completion(&cmd->write_pending_abort_comp);
+ 
  	memcpy(&cmd->atio, atio, sizeof(*atio));
  	cmd->state = QLA_TGT_STATE_NEW;
  	cmd->tgt = vha->vha_tgt.qla_tgt;