[PATCH] media: mediatek: vcodec: destroy core workqueue on remove

[Guangshuo Li <lgs201920130244@gmail.com>]

The decoder probe allocates core_workqueue for latency-based decoder
architectures. The probe failure paths destroy the workqueue, but the
normal remove path only destroys decode_workqueue.

As a result, removing a latency-based decoder leaves core_workqueue
allocated after the device lifetime has ended.

Destroy core_workqueue during remove for latency-based decoder
architectures, matching the cleanup performed by the probe failure
paths.

This issue was found by manual code inspection.

Fixes: 365e4ba01df4 ("media: mtk-vcodec: Add work queue for core hardware decode")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
 .../media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
index e936ed8dffba..426d060d937c 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
@@ -570,6 +570,8 @@ static void mtk_vcodec_dec_remove(struct platform_device *pdev)
 	struct mtk_vcodec_dec_dev *dev = platform_get_drvdata(pdev);
 
 	destroy_workqueue(dev->decode_workqueue);
+	if (IS_VDEC_LAT_ARCH(dev->vdec_pdata->hw_arch))
+		destroy_workqueue(dev->core_workqueue);
 
 	if (media_devnode_is_registered(dev->mdev_dec.devnode)) {
 		media_device_unregister(&dev->mdev_dec);
-- 
2.43.0