[PATCH v3 1/2] media: nuvoton: npcm-video: fix error handling in npcm_video_init()

[David Carlier]

npcm_video_init() has two error handling issues after
of_reserved_mem_device_init() is called:

When dma_set_mask_and_coherent() fails, the function releases the
reserved memory but does not return, allowing execution to fall through
into npcm_video_ece_init() with a failed DMA configuration.

When npcm_video_ece_init() fails, the function returns an error without
calling of_reserved_mem_device_release(), leaking the reserved memory
association.

Fix both by adding the missing return after the DMA mask failure and
adding the missing of_reserved_mem_device_release() call on the ECE init
error path.

Fixes: 46c15a4ff1f4 ("media: nuvoton: Add driver for NPCM video capture and encoding engine")
Signed-off-by: David Carlier <devnexen at gmail.com>
---
 drivers/media/platform/nuvoton/npcm-video.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/platform/nuvoton/npcm-video.c b/drivers/media/platform/nuvoton/npcm-video.c
index b2a562e1ee1c..5c6bddfe8073 100644
--- a/drivers/media/platform/nuvoton/npcm-video.c
+++ b/drivers/media/platform/nuvoton/npcm-video.c
@@ -1720,10 +1720,12 @@ static int npcm_video_init(struct npcm_video *video)
 	if (rc) {
 		dev_err(dev, "Failed to set DMA mask\n");
 		of_reserved_mem_device_release(dev);
+		return rc;
 	}
 
 	rc = npcm_video_ece_init(video);
 	if (rc) {
+		of_reserved_mem_device_release(dev);
 		dev_err(dev, "Failed to initialize ECE\n");
 		return rc;
 	}
-- 
2.53.0