[PATCH] media: ti: vpe: unwind v4l2 device registration on probe error

[PATCH] media: ti: vpe: unwind v4l2 device registration on probe error

[박명훈]

From: Myeonghun Pak <mhun512@gmail.com>

If the vpe_top resource is missing, vpe_probe() returns -ENODEV after
v4l2_device_register() has succeeded. Probe failures do not call the
driver's remove callback, so the v4l2 device remains registered on that
error path.

Route that failure through the existing v4l2_device_unregister() unwind
label, matching the other errors after v4l2_device_register().

Fixes: 4d59c7d45585 ("media: ti-vpe: vpe: Add missing null pointer checks")
Cc: stable@vger.kernel.org
Co-developed-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
---
Notes for send preparation:
- Fixes tag was validated against upstream history; the local row worktree
  remains shallow/grafted and cannot verify it by itself.
- Build was not completed because this worktree has no .config.

 drivers/media/platform/ti/vpe/vpe.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/ti/vpe/vpe.c b/drivers/media/platform/ti/vpe/vpe.c
index a7e5a85e72..81bd1f9cee 100644
--- a/drivers/media/platform/ti/vpe/vpe.c
+++ b/drivers/media/platform/ti/vpe/vpe.c
@@ -2539,7 +2539,8 @@ static int vpe_probe(struct platform_device *pdev)
 						"vpe_top");
 	if (!dev->res) {
 		dev_err(&pdev->dev, "missing 'vpe_top' resources data\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto v4l2_dev_unreg;
 	}
 
 	/*
-- 
2.39.5

Re: [PATCH] media: ti: vpe: unwind v4l2 device registration on probe error

[Yemike Abhilash Chandra]

Hi,

On 26/04/26 18:46, 박명훈 wrote:
> From: Myeonghun Pak <mhun512@gmail.com>
> 
> If the vpe_top resource is missing, vpe_probe() returns -ENODEV after
> v4l2_device_register() has succeeded. Probe failures do not call the
> driver's remove callback, so the v4l2 device remains registered on that
> error path.
> 
> Route that failure through the existing v4l2_device_unregister() unwind
> label, matching the other errors after v4l2_device_register().
> 
> Fixes: 4d59c7d45585 ("media: ti-vpe: vpe: Add missing null pointer checks")
> Cc: stable@vger.kernel.org
> Co-developed-by: Ijae Kim <ae878000@gmail.com>
> Signed-off-by: Ijae Kim <ae878000@gmail.com>
> Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
> ---
> Notes for send preparation:
> - Fixes tag was validated against upstream history; the local row worktree
>    remains shallow/grafted and cannot verify it by itself.
> - Build was not completed because this worktree has no .config.
> 

Why can't you build test?

Having said that, the fix seems trivial and correct to me. Hence

Reviewed-by: Yemike Abhilash Chandra <y-abhilashchandra@ti.com>

>   drivers/media/platform/ti/vpe/vpe.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/ti/vpe/vpe.c b/drivers/media/platform/ti/vpe/vpe.c
> index a7e5a85e72..81bd1f9cee 100644
> --- a/drivers/media/platform/ti/vpe/vpe.c
> +++ b/drivers/media/platform/ti/vpe/vpe.c
> @@ -2539,7 +2539,8 @@ static int vpe_probe(struct platform_device *pdev)
>   						"vpe_top");
>   	if (!dev->res) {
>   		dev_err(&pdev->dev, "missing 'vpe_top' resources data\n");
> -		return -ENODEV;
> +		ret = -ENODEV;
> +		goto v4l2_dev_unreg;
>   	}
>   
>   	/*