1 files changed, 4 insertions, 91 deletions

diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index be65d55e1fc4..e018459b534f 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -23,10 +23,8 @@ struct idxd_fault {
 };
 
 static int irq_process_work_list(struct idxd_irq_entry *irq_entry,
-				 enum irq_work_type wtype,
 				 int *processed, u64 data);
 static int irq_process_pending_llist(struct idxd_irq_entry *irq_entry,
-				     enum irq_work_type wtype,
 				     int *processed, u64 data);
 
 static void idxd_device_reinit(struct work_struct *work)
@@ -62,46 +60,6 @@ static void idxd_device_reinit(struct work_struct *work)
 	idxd_device_clear_state(idxd);
 }
 
-static void idxd_device_fault_work(struct work_struct *work)
-{
-	struct idxd_fault *fault = container_of(work, struct idxd_fault, work);
-	struct idxd_irq_entry *ie;
-	int i;
-	int processed;
-	int irqcnt = fault->idxd->num_wq_irqs + 1;
-
-	for (i = 1; i < irqcnt; i++) {
-		ie = &fault->idxd->irq_entries[i];
-		irq_process_work_list(ie, IRQ_WORK_PROCESS_FAULT,
-				      &processed, fault->addr);
-		if (processed)
-			break;
-
-		irq_process_pending_llist(ie, IRQ_WORK_PROCESS_FAULT,
-					  &processed, fault->addr);
-		if (processed)
-			break;
-	}
-
-	kfree(fault);
-}
-
-static int idxd_device_schedule_fault_process(struct idxd_device *idxd,
-					      u64 fault_addr)
-{
-	struct idxd_fault *fault;
-
-	fault = kmalloc(sizeof(*fault), GFP_ATOMIC);
-	if (!fault)
-		return -ENOMEM;
-
-	fault->addr = fault_addr;
-	fault->idxd = idxd;
-	INIT_WORK(&fault->work, idxd_device_fault_work);
-	queue_work(idxd->wq, &fault->work);
-	return 0;
-}
-
 static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 {
 	struct device *dev = &idxd->pdev->dev;
@@ -168,15 +126,6 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 	if (!err)
 		return 0;
 
-	/*
-	 * This case should rarely happen and typically is due to software
-	 * programming error by the driver.
-	 */
-	if (idxd->sw_err.valid &&
-	    idxd->sw_err.desc_valid &&
-	    idxd->sw_err.fault_addr)
-		idxd_device_schedule_fault_process(idxd, idxd->sw_err.fault_addr);
-
 	gensts.bits = ioread32(idxd->reg_base + IDXD_GENSTATS_OFFSET);
 	if (gensts.state == IDXD_DEVICE_STATE_HALT) {
 		idxd->state = IDXD_DEV_HALTED;
@@ -228,43 +177,19 @@ irqreturn_t idxd_misc_thread(int vec, void *data)
 	return IRQ_HANDLED;
 }
 
-static inline bool match_fault(struct idxd_desc *desc, u64 fault_addr)
-{
-	/*
-	 * Completion address can be bad as well. Check fault address match for descriptor
-	 * and completion address.
-	 */
-	if ((u64)desc->hw == fault_addr || (u64)desc->completion == fault_addr) {
-		struct idxd_device *idxd = desc->wq->idxd;
-		struct device *dev = &idxd->pdev->dev;
-
-		dev_warn(dev, "desc with fault address: %#llx\n", fault_addr);
-		return true;
-	}
-
-	return false;
-}
-
 static int irq_process_pending_llist(struct idxd_irq_entry *irq_entry,
-				     enum irq_work_type wtype,
 				     int *processed, u64 data)
 {
 	struct idxd_desc *desc, *t;
 	struct llist_node *head;
 	int queued = 0;
 	unsigned long flags;
-	enum idxd_complete_type reason;
 
 	*processed = 0;
 	head = llist_del_all(&irq_entry->pending_llist);
 	if (!head)
 		goto out;
 
-	if (wtype == IRQ_WORK_NORMAL)
-		reason = IDXD_COMPLETE_NORMAL;
-	else
-		reason = IDXD_COMPLETE_DEV_FAIL;
-
 	llist_for_each_entry_safe(desc, t, head, llnode) {
 		u8 status = desc->completion->status & DSA_COMP_STATUS_MASK;
 
@@ -275,9 +200,7 @@ static int irq_process_pending_llist(struct idxd_irq_entry *irq_entry,
 				continue;
 			}
 
-			if (unlikely(status != DSA_COMP_SUCCESS))
-				match_fault(desc, data);
-			complete_desc(desc, reason);
+			complete_desc(desc, IDXD_COMPLETE_NORMAL);
 			(*processed)++;
 		} else {
 			spin_lock_irqsave(&irq_entry->list_lock, flags);
@@ -293,20 +216,14 @@ static int irq_process_pending_llist(struct idxd_irq_entry *irq_entry,
 }
 
 static int irq_process_work_list(struct idxd_irq_entry *irq_entry,
-				 enum irq_work_type wtype,
 				 int *processed, u64 data)
 {
 	int queued = 0;
 	unsigned long flags;
 	LIST_HEAD(flist);
 	struct idxd_desc *desc, *n;
-	enum idxd_complete_type reason;
 
 	*processed = 0;
-	if (wtype == IRQ_WORK_NORMAL)
-		reason = IDXD_COMPLETE_NORMAL;
-	else
-		reason = IDXD_COMPLETE_DEV_FAIL;
 
 	/*
 	 * This lock protects list corruption from access of list outside of the irq handler
@@ -338,9 +255,7 @@ static int irq_process_work_list(struct idxd_irq_entry *irq_entry,
 			continue;
 		}
 
-		if (unlikely(status != DSA_COMP_SUCCESS))
-			match_fault(desc, data);
-		complete_desc(desc, reason);
+		complete_desc(desc, IDXD_COMPLETE_NORMAL);
 	}
 
 	return queued;
@@ -370,14 +285,12 @@ static int idxd_desc_process(struct idxd_irq_entry *irq_entry)
 	 * 5. Repeat until no more descriptors.
 	 */
 	do {
-		rc = irq_process_work_list(irq_entry, IRQ_WORK_NORMAL,
-					   &processed, 0);
+		rc = irq_process_work_list(irq_entry, &processed, 0);
 		total += processed;
 		if (rc != 0)
 			continue;
 
-		rc = irq_process_pending_llist(irq_entry, IRQ_WORK_NORMAL,
-					       &processed, 0);
+		rc = irq_process_pending_llist(irq_entry, &processed, 0);
 		total += processed;
 	} while (rc != 0);