[PATCH v3 4/9] dmaengine: idxd: Add missing cleanup for early error out in idxd_setup_internals

[Shuai Xue]

The idxd_setup_internals() is missing some cleanup when things fail in
the middle.

Add the appropriate cleanup routines:

- cleanup groups
- cleanup enginces
- cleanup wqs

to make sure it exits gracefully.

Fixes: defe49f96012 ("dmaengine: idxd: fix group conf_dev lifetime")
Cc: stable@xxxxxxxxxxxxxxx
Suggested-by: Fenghua Yu <fenghuay@xxxxxxxxxx>
Signed-off-by: Shuai Xue <xueshuai@xxxxxxxxxxxxxxxxx>
---
 drivers/dma/idxd/init.c | 59 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 52 insertions(+), 7 deletions(-)

diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index fe4a14813bba..7334085939dc 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -155,6 +155,26 @@ static void idxd_cleanup_interrupts(struct idxd_device *idxd)
 	pci_free_irq_vectors(pdev);
 }
 
+static void idxd_clean_wqs(struct idxd_device *idxd)
+{
+	struct idxd_wq *wq;
+	struct device *conf_dev;
+	int i;
+
+	for (i = 0; i < idxd->max_wqs; i++) {
+		wq = idxd->wqs[i];
+		if (idxd->hw.wq_cap.op_config)
+			bitmap_free(wq->opcap_bmap);
+		kfree(wq->wqcfg);
+		conf_dev = wq_confdev(wq);
+		put_device(conf_dev);
+		kfree(wq);
+
+	}
+	bitmap_free(idxd->wq_enable_map);
+	kfree(idxd->wqs);
+}
+
 static int idxd_setup_wqs(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
@@ -245,6 +265,21 @@ static int idxd_setup_wqs(struct idxd_device *idxd)
 	return rc;
 }
 
+static void idxd_clean_engines(struct idxd_device *idxd)
+{
+	struct idxd_engine *engine;
+	struct device *conf_dev;
+	int i;
+
+	for (i = 0; i < idxd->max_engines; i++) {
+		engine = idxd->engines[i];
+		conf_dev = engine_confdev(engine);
+		put_device(conf_dev);
+		kfree(engine);
+	}
+	kfree(idxd->engines);
+}
+
 static int idxd_setup_engines(struct idxd_device *idxd)
 {
 	struct idxd_engine *engine;
@@ -296,6 +331,19 @@ static int idxd_setup_engines(struct idxd_device *idxd)
 	return rc;
 }
 
+static void idxd_clean_groups(struct idxd_device *idxd)
+{
+	struct idxd_group *group;
+	int i;
+
+	for (i = 0; i < idxd->max_groups; i++) {
+		group = idxd->groups[i];
+		put_device(group_confdev(group));
+		kfree(group);
+	}
+	kfree(idxd->groups);
+}
+
 static int idxd_setup_groups(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
@@ -410,7 +458,7 @@ static int idxd_init_evl(struct idxd_device *idxd)
 static int idxd_setup_internals(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
-	int rc, i;
+	int rc;
 
 	init_waitqueue_head(&idxd->cmd_waitq);
 
@@ -441,14 +489,11 @@ static int idxd_setup_internals(struct idxd_device *idxd)
  err_evl:
 	destroy_workqueue(idxd->wq);
  err_wkq_create:
-	for (i = 0; i < idxd->max_groups; i++)
-		put_device(group_confdev(idxd->groups[i]));
+	idxd_clean_groups(idxd);
  err_group:
-	for (i = 0; i < idxd->max_engines; i++)
-		put_device(engine_confdev(idxd->engines[i]));
+	idxd_clean_engines(idxd);
  err_engine:
-	for (i = 0; i < idxd->max_wqs; i++)
-		put_device(wq_confdev(idxd->wqs[i]));
+	idxd_clean_wqs(idxd);
  err_wqs:
 	return rc;
 }
-- 
2.39.3