linux-kernel - [PATCH] media: ti-vpe: Add cleanup in vpdma_list

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Date:   Sun, 18 Aug 2019 01:40:04 -0500
From:   Wenwen Wang <wenwen@...uga.edu>
To:     Wenwen Wang <wenwen@...uga.edu>
Cc:     Benoit Parrot <bparrot@...com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org (open list:TI VPE/CAL DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] media: ti-vpe: Add cleanup in vpdma_list_cleanup()

If an error occurs in this function, no cleanup is executed, leading to
memory/resource leaks. To fix this issue, introduce two labels to perform
the cleanup work.

Signed-off-by: Wenwen Wang <wenwen@...uga.edu>
---
 drivers/media/platform/ti-vpe/vpdma.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/ti-vpe/vpdma.c b/drivers/media/platform/ti-vpe/vpdma.c
index fd37d79..53d27cd 100644
--- a/drivers/media/platform/ti-vpe/vpdma.c
+++ b/drivers/media/platform/ti-vpe/vpdma.c
@@ -445,23 +445,25 @@ int vpdma_list_cleanup(struct vpdma_data *vpdma, int list_num,
 
 	ret = vpdma_map_desc_buf(vpdma, &abort_list.buf);
 	if (ret)
-		return ret;
+		goto free_desc;
 	ret = vpdma_submit_descs(vpdma, &abort_list, list_num);
 	if (ret)
-		return ret;
+		goto unmap_desc;
 
 	while (vpdma_list_busy(vpdma, list_num) && --timeout)
 		;
 
 	if (timeout == 0) {
 		dev_err(&vpdma->pdev->dev, "Timed out cleaning up VPDMA list\n");
-		return -EBUSY;
+		ret = -EBUSY;
 	}
 
+unmap_desc:
 	vpdma_unmap_desc_buf(vpdma, &abort_list.buf);
+free_desc:
 	vpdma_free_desc_buf(&abort_list.buf);
 
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL(vpdma_list_cleanup);
 
-- 
2.7.4