Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Five fixes, all in drivers.

  The big change is the UFS task management rework, with lpfc next and
  the rest being fairly minor and obvious fixes"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: iscsi: Fix iscsi_task use after free
  scsi: lpfc: Fix memory overwrite during FC-GS I/O abort handling
  scsi: elx: efct: Delete stray unlock statement
  scsi: ufs: core: Fix task management completion
  scsi: acornscsi: Remove scsi_cmd_to_tag() reference

6 files changed, 41 insertions, 43 deletions

diff --git a/drivers/scsi/arm/acornscsi.c b/drivers/scsi/arm/acornscsi.c
index b4cb5fb19998..0cc62c1b0825 100644
--- a/drivers/scsi/arm/acornscsi.c
+++ b/drivers/scsi/arm/acornscsi.c
@@ -1776,7 +1776,7 @@ int acornscsi_reconnect_finish(AS_Host *host)
 	host->scsi.disconnectable = 0;
 	if (host->SCpnt->device->id  == host->scsi.reconnected.target &&
 	    host->SCpnt->device->lun == host->scsi.reconnected.lun &&
-	    scsi_cmd_to_tag(host->SCpnt) == host->scsi.reconnected.tag) {
+	    scsi_cmd_to_rq(host->SCpnt)->tag == host->scsi.reconnected.tag) {
 #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
 	    DBG(host->SCpnt, printk("scsi%d.%c: reconnected",
 		    host->host->host_no, acornscsi_target(host)));
diff --git a/drivers/scsi/elx/efct/efct_scsi.c b/drivers/scsi/elx/efct/efct_scsi.c
index 40fb3a724c76..cf2e41dd354c 100644
--- a/drivers/scsi/elx/efct/efct_scsi.c
+++ b/drivers/scsi/elx/efct/efct_scsi.c
@@ -32,7 +32,7 @@ efct_scsi_io_alloc(struct efct_node *node)
 	struct efct *efct;
 	struct efct_xport *xport;
 	struct efct_io *io;
-	unsigned long flags = 0;
+	unsigned long flags;
 
 	efct = node->efct;
 
@@ -44,7 +44,6 @@ efct_scsi_io_alloc(struct efct_node *node)
 	if (!io) {
 		efc_log_err(efct, "IO alloc Failed\n");
 		atomic_add_return(1, &xport->io_alloc_failed_count);
-		spin_unlock_irqrestore(&node->active_ios_lock, flags);
 		return NULL;
 	}
 
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 4683c183e9d4..5bc91d34df63 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -2281,11 +2281,6 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
 		return FAILED;
 	}
 
-	conn = session->leadconn;
-	iscsi_get_conn(conn->cls_conn);
-	conn->eh_abort_cnt++;
-	age = session->age;
-
 	spin_lock(&session->back_lock);
 	task = (struct iscsi_task *)sc->SCp.ptr;
 	if (!task || !task->sc) {
@@ -2293,8 +2288,16 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
 		ISCSI_DBG_EH(session, "sc completed while abort in progress\n");
 
 		spin_unlock(&session->back_lock);
-		goto success;
+		spin_unlock_bh(&session->frwd_lock);
+		mutex_unlock(&session->eh_mutex);
+		return SUCCESS;
 	}
+
+	conn = session->leadconn;
+	iscsi_get_conn(conn->cls_conn);
+	conn->eh_abort_cnt++;
+	age = session->age;
+
 	ISCSI_DBG_EH(session, "aborting [sc %p itt 0x%x]\n", sc, task->itt);
 	__iscsi_get_task(task);
 	spin_unlock(&session->back_lock);
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 78ce38d7251c..026a1196a54d 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -12292,12 +12292,12 @@ void
 lpfc_ignore_els_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 		     struct lpfc_iocbq *rspiocb)
 {
-	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
+	struct lpfc_nodelist *ndlp = NULL;
 	IOCB_t *irsp = &rspiocb->iocb;
 
 	/* ELS cmd tag <ulpIoTag> completes */
 	lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
-			"0139 Ignoring ELS cmd tag x%x completion Data: "
+			"0139 Ignoring ELS cmd code x%x completion Data: "
 			"x%x x%x x%x\n",
 			irsp->ulpIoTag, irsp->ulpStatus,
 			irsp->un.ulpWord[4], irsp->ulpTimeout);
@@ -12305,10 +12305,13 @@ lpfc_ignore_els_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	 * Deref the ndlp after free_iocb. sli_release_iocb will access the ndlp
 	 * if exchange is busy.
 	 */
-	if (cmdiocb->iocb.ulpCommand == CMD_GEN_REQUEST64_CR)
+	if (cmdiocb->iocb.ulpCommand == CMD_GEN_REQUEST64_CR) {
+		ndlp = cmdiocb->context_un.ndlp;
 		lpfc_ct_free_iocb(phba, cmdiocb);
-	else
+	} else {
+		ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
 		lpfc_els_free_iocb(phba, cmdiocb);
+	}
 
 	lpfc_nlp_put(ndlp);
 }
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 188de6f91050..95be7ecdfe10 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6377,27 +6377,6 @@ static irqreturn_t ufshcd_check_errors(struct ufs_hba *hba, u32 intr_status)
 	return retval;
 }
 
-struct ctm_info {
-	struct ufs_hba	*hba;
-	unsigned long	pending;
-	unsigned int	ncpl;
-};
-
-static bool ufshcd_compl_tm(struct request *req, void *priv, bool reserved)
-{
-	struct ctm_info *const ci = priv;
-	struct completion *c;
-
-	WARN_ON_ONCE(reserved);
-	if (test_bit(req->tag, &ci->pending))
-		return true;
-	ci->ncpl++;
-	c = req->end_io_data;
-	if (c)
-		complete(c);
-	return true;
-}
-
 /**
  * ufshcd_tmc_handler - handle task management function completion
  * @hba: per adapter instance
@@ -6408,18 +6387,24 @@ static bool ufshcd_compl_tm(struct request *req, void *priv, bool reserved)
  */
 static irqreturn_t ufshcd_tmc_handler(struct ufs_hba *hba)
 {
-	unsigned long flags;
-	struct request_queue *q = hba->tmf_queue;
-	struct ctm_info ci = {
-		.hba	 = hba,
-	};
+	unsigned long flags, pending, issued;
+	irqreturn_t ret = IRQ_NONE;
+	int tag;
+
+	pending = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL);
 
 	spin_lock_irqsave(hba->host->host_lock, flags);
-	ci.pending = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL);
-	blk_mq_tagset_busy_iter(q->tag_set, ufshcd_compl_tm, &ci);
+	issued = hba->outstanding_tasks & ~pending;
+	for_each_set_bit(tag, &issued, hba->nutmrs) {
+		struct request *req = hba->tmf_rqs[tag];
+		struct completion *c = req->end_io_data;
+
+		complete(c);
+		ret = IRQ_HANDLED;
+	}
 	spin_unlock_irqrestore(hba->host->host_lock, flags);
 
-	return ci.ncpl ? IRQ_HANDLED : IRQ_NONE;
+	return ret;
 }
 
 /**
@@ -6542,9 +6527,9 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
 	ufshcd_hold(hba, false);
 
 	spin_lock_irqsave(host->host_lock, flags);
-	blk_mq_start_request(req);
 
 	task_tag = req->tag;
+	hba->tmf_rqs[req->tag] = req;
 	treq->upiu_req.req_header.dword_0 |= cpu_to_be32(task_tag);
 
 	memcpy(hba->utmrdl_base_addr + task_tag, treq, sizeof(*treq));
@@ -6585,6 +6570,7 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
 	}
 
 	spin_lock_irqsave(hba->host->host_lock, flags);
+	hba->tmf_rqs[req->tag] = NULL;
 	__clear_bit(task_tag, &hba->outstanding_tasks);
 	spin_unlock_irqrestore(hba->host->host_lock, flags);
 
@@ -9635,6 +9621,12 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 		err = PTR_ERR(hba->tmf_queue);
 		goto free_tmf_tag_set;
 	}
+	hba->tmf_rqs = devm_kcalloc(hba->dev, hba->nutmrs,
+				    sizeof(*hba->tmf_rqs), GFP_KERNEL);
+	if (!hba->tmf_rqs) {
+		err = -ENOMEM;
+		goto free_tmf_queue;
+	}
 
 	/* Reset the attached device */
 	ufshcd_device_reset(hba);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index f0da5d3db1fa..41f6e06f9185 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -828,6 +828,7 @@ struct ufs_hba {
 
 	struct blk_mq_tag_set tmf_tag_set;
 	struct request_queue *tmf_queue;
+	struct request **tmf_rqs;
 
 	struct uic_command *active_uic_cmd;
 	struct mutex uic_cmd_mutex;