[PATCH] usb: musb: mediatek: fix child device leak

[PATCH] usb: musb: mediatek: fix child device leak

[Guangshuo Li]

mtk_musb_probe() populates child platform devices using
of_platform_populate(), but neither the probe error paths nor the
driver remove path depopulate them.

If any initialization step after of_platform_populate() fails, the
probe returns without unregistering the populated child devices.
Likewise, the children remain registered when the driver is later
unbound.

Use devm_of_platform_populate() so the populated child devices are
automatically depopulated when probe fails or the driver is unbound.

The issue was identified by a static analysis tool I developed and
confirmed by manual review.

Fixes: 0990366bab3c ("usb: musb: Add support for MediaTek musb controller")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
 drivers/usb/musb/mediatek.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/musb/mediatek.c b/drivers/usb/musb/mediatek.c
index c6cbe718b1da..3aff0add2faf 100644
--- a/drivers/usb/musb/mediatek.c
+++ b/drivers/usb/musb/mediatek.c
@@ -415,7 +415,7 @@ static int mtk_musb_probe(struct platform_device *pdev)
 	if (!pdata)
 		return -ENOMEM;
 
-	ret = of_platform_populate(np, NULL, NULL, dev);
+	ret = devm_of_platform_populate(dev);
 	if (ret)
 		return dev_err_probe(dev, ret,
 				"failed to create child devices at %p\n", np);
-- 
2.43.0

Re: [PATCH] usb: musb: mediatek: fix child device leak

[krzk]

On Mon, 21 Sep 2026 16:51:19 +0800, Guangshuo Li wrote:
> mtk_musb_probe() populates child platform devices using
> of_platform_populate(), but neither the probe error paths nor the
> driver remove path depopulate them.
> 
> If any initialization step after of_platform_populate() fails, the
> probe returns without unregistering the populated child devices.
> Likewise, the children remain registered when the driver is later
> unbound.
> 
> Use devm_of_platform_populate() so the populated child devices are
> automatically depopulated when probe fails or the driver is unbound.
> 
> The issue was identified by a static analysis tool I developed and
> confirmed by manual review.
> 
> Fixes: 0990366bab3c ("usb: musb: Add support for MediaTek musb controller")
> Cc: stable@vger.kernel.org
> Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
> ---
>  drivers/usb/musb/mediatek.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 


You sent multiple independent patches, to multiple independent
subsystems. The amount of these patches clearly suggest this was
AI generated and most likely not tested.

More importantly, you sent all this work without properly organizing
relevant patches into patchsets. This makes reviewing difficult
and might cause multiple reviewers to address the same issue.
Replying to the entire set is impossible and requires handling each
patch independently, instead of applying or discarding the set.
Maintainers also won't see the bigger picture of your work. Quite
worrying.

This is on the verge of hostile patch: bomb us with so many
contributions, we won't be able to handle them in efficient manner,
like responding ONCE to ask you to slow down.  Considering all this
is untested and LLM generated, I have even more doubts whether this
should be considered for review.

Please read kernel documentation BEFORE posting more work. It will
explain you how to identify subsystems, how to organize your work per
subsystem, how to document usage of LLM and how what you should not
do if this was posted in a good faith.

Best regards,
Krzysztof

Re: [PATCH] usb: musb: mediatek: fix child device leak

[Guangshuo Li]

Hi Krzysztof,

Thank you for your feedback.

On Mon, 21 Sept 2026 at 23:03, <krzk@kernel.org> wrote:
>
>
> On Mon, 21 Sep 2026 16:51:19 +0800, Guangshuo Li wrote:
> > mtk_musb_probe() populates child platform devices using
> > of_platform_populate(), but neither the probe error paths nor the
> > driver remove path depopulate them.
> >
> > If any initialization step after of_platform_populate() fails, the
> > probe returns without unregistering the populated child devices.
> > Likewise, the children remain registered when the driver is later
> > unbound.
> >
> > Use devm_of_platform_populate() so the populated child devices are
> > automatically depopulated when probe fails or the driver is unbound.
> >
> > The issue was identified by a static analysis tool I developed and
> > confirmed by manual review.
> >
> > Fixes: 0990366bab3c ("usb: musb: Add support for MediaTek musb controller")
> > Cc: stable@vger.kernel.org
> > Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
> > ---
> >  drivers/usb/musb/mediatek.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
>
>
> You sent multiple independent patches, to multiple independent
> subsystems. The amount of these patches clearly suggest this was
> AI generated and most likely not tested.
>
> More importantly, you sent all this work without properly organizing
> relevant patches into patchsets. This makes reviewing difficult
> and might cause multiple reviewers to address the same issue.
> Replying to the entire set is impossible and requires handling each
> patch independently, instead of applying or discarding the set.
> Maintainers also won't see the bigger picture of your work. Quite
> worrying.
>
> This is on the verge of hostile patch: bomb us with so many
> contributions, we won't be able to handle them in efficient manner,
> like responding ONCE to ask you to slow down.  Considering all this
> is untested and LLM generated, I have even more doubts whether this
> should be considered for review.
>
> Please read kernel documentation BEFORE posting more work. It will
> explain you how to identify subsystems, how to organize your work per
> subsystem, how to document usage of LLM and how what you should not
> do if this was posted in a good faith.
>
> Best regards,
> Krzysztof
>
>
>

I would like to clarify that these patches were manually reviewed and
audited by us; they were not simply generated and submitted by an LLM.
However, I understand why the recent submission pattern may have given
that impression. We sent too many patches in a short period of time,
and we also failed to respond to some discussions in a timely manner,
which made the situation look worse.

Many of the recent patches, especially the v2 revisions, are
corrections and improvements based on previous review feedback rather
than completely new untested changes. That said, we recognize that the
way we submitted them increased the burden on maintainers and
reviewers.

We apologize for the pressure this caused to the community. We will be
more careful about organizing patches by subsystem, preparing proper
patchsets, and following the kernel contribution guidelines before
sending future work.

Thank you again for pointing this out.

Best regards,
Guangshuo

Re: [PATCH] usb: musb: mediatek: fix child device leak

[krzk]

On Mon, 21 Sep 2026 16:51:19 +0800, Guangshuo Li wrote:
> mtk_musb_probe() populates child platform devices using
> of_platform_populate(), but neither the probe error paths nor the
> driver remove path depopulate them.
> 
> If any initialization step after of_platform_populate() fails, the
> probe returns without unregistering the populated child devices.
> Likewise, the children remain registered when the driver is later
> unbound.
> 
> Use devm_of_platform_populate() so the populated child devices are
> automatically depopulated when probe fails or the driver is unbound.
> 
> The issue was identified by a static analysis tool I developed and
> confirmed by manual review.
> 
> Fixes: 0990366bab3c ("usb: musb: Add support for MediaTek musb controller")
> Cc: stable@vger.kernel.org
> Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
> ---
>  drivers/usb/musb/mediatek.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 


You sent multiple independent patches, to multiple independent
subsystems. The amount of these patches clearly suggest this was
AI generated and most likely not tested.

More importantly, you sent all this work without properly organizing
relevant patches into patchsets. This makes reviewing difficult
and might cause multiple reviewers to address the same issue.
Replying to the entire set is impossible and requires handling each
patch independently, instead of applying or discarding the set.
Maintainers also won't see the bigger picture of your work. Quite
worrying.

This is on the verge of hostile patch: bomb us with so many
contributions, we won't be able to handle them in efficient manner,
like responding ONCE to ask you to slow down.  Considering all this
is untested and LLM generated, I have even more doubts whether this
should be considered for review.

Please read kernel documentation BEFORE posting more work. It will
explain you how to identify subsystems, how to organize your work per
subsystem, how to document usage of LLM and how what you should not
do if this was posted in a good faith.

Best regards,
Krzysztof

Re: [PATCH] usb: musb: mediatek: fix child device leak

[krzk]

On Mon, 21 Sep 2026 16:51:19 +0800, Guangshuo Li wrote:
> mtk_musb_probe() populates child platform devices using
> of_platform_populate(), but neither the probe error paths nor the
> driver remove path depopulate them.
> 
> If any initialization step after of_platform_populate() fails, the
> probe returns without unregistering the populated child devices.
> Likewise, the children remain registered when the driver is later
> unbound.
> 
> Use devm_of_platform_populate() so the populated child devices are
> automatically depopulated when probe fails or the driver is unbound.
> 
> The issue was identified by a static analysis tool I developed and
> confirmed by manual review.
> 
> Fixes: 0990366bab3c ("usb: musb: Add support for MediaTek musb controller")
> Cc: stable@vger.kernel.org
> Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
> ---
>  drivers/usb/musb/mediatek.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 


You sent multiple independent patches, to multiple independent
subsystems. The amount of these patches clearly suggest this was
AI generated and most likely not tested.

More importantly, you sent all this work without properly organizing
relevant patches into patchsets. This makes reviewing difficult
and might cause multiple reviewers to address the same issue.
Replying to the entire set is impossible and requires handling each
patch independently, instead of applying or discarding the set.
Maintainers also won't see the bigger picture of your work. Quite
worrying.

This is on the verge of hostile patch: bomb us with so many
contributions, we won't be able to handle them in efficient manner,
like responding ONCE to ask you to slow down.  Considering all this
is untested and LLM generated, I have even more doubts whether this
should be considered for review.

Please read kernel documentation BEFORE posting more work. It will
explain you how to identify subsystems, how to organize your work per
subsystem, how to document usage of LLM and how what you should not
do if this was posted in a good faith.

Best regards,
Krzysztof