[PATCH] mfd: da9055: Fix missing regmap_del_irq_chip() in error path

[PATCH] mfd: da9055: Fix missing regmap_del_irq_chip() in error path

[Haotian Zhang]

When da9055_device_init() fails after regmap_add_irq_chip()
succeeds but mfd_add_devices() fails, the error handling path
only calls mfd_remove_devices() but forgets to call
regmap_del_irq_chip(). This results in a resource leak.

Fix this by adding regmap_del_irq_chip() to the error path so
that resources are released properly.

Fixes: 2896434cf272 ("mfd: DA9055 core driver")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
---
 drivers/mfd/da9055-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/da9055-core.c b/drivers/mfd/da9055-core.c
index 1f727ef60d63..8c989b74f924 100644
--- a/drivers/mfd/da9055-core.c
+++ b/drivers/mfd/da9055-core.c
@@ -388,6 +388,7 @@ int da9055_device_init(struct da9055 *da9055)
 
 err:
 	mfd_remove_devices(da9055->dev);
+	regmap_del_irq_chip(da9055->chip_irq, da9055->irq_data);
 	return ret;
 }
 
-- 
2.50.1.windows.1

Re: [PATCH] mfd: da9055: Fix missing regmap_del_irq_chip() in error path

[Christophe JAILLET]

Le 10/10/2025 à 03:17, Haotian Zhang a écrit :
> When da9055_device_init() fails after regmap_add_irq_chip()
> succeeds but mfd_add_devices() fails, the error handling path
> only calls mfd_remove_devices() but forgets to call
> regmap_del_irq_chip(). This results in a resource leak.
> 
> Fix this by adding regmap_del_irq_chip() to the error path so
> that resources are released properly.
> 
> Fixes: 2896434cf272 ("mfd: DA9055 core driver")
> Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
> ---
>   drivers/mfd/da9055-core.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mfd/da9055-core.c b/drivers/mfd/da9055-core.c
> index 1f727ef60d63..8c989b74f924 100644
> --- a/drivers/mfd/da9055-core.c
> +++ b/drivers/mfd/da9055-core.c
> @@ -388,6 +388,7 @@ int da9055_device_init(struct da9055 *da9055)
>   
>   err:
>   	mfd_remove_devices(da9055->dev);

I don't think that mfd_remove_devices() is needed here. Looks harmless, 
but should mfd_add_devices() fail, this clean-up is already done (see [1]).

CJ

[1]: 
https://elixir.bootlin.com/linux/v6.17.1/source/drivers/mfd/mfd-core.c#L337

> +	regmap_del_irq_chip(da9055->chip_irq, da9055->irq_data);
>   	return ret;
>   }
>   

Re: [PATCH] mfd: da9055: Fix missing regmap_del_irq_chip() in error path

[Markus Elfring]

> When da9055_device_init() fails after regmap_add_irq_chip()
> succeeds but mfd_add_devices() fails, the error handling path
…

You may occasionally put more than 61 characters into text lines
of such a change description.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.17#n658

Regards,
Markus

Re: [PATCH] mfd: da9055: Fix missing regmap_del_irq_chip() in error path

[Lee Jones]

On Fri, 10 Oct 2025, Christophe JAILLET wrote:

> Le 10/10/2025 à 03:17, Haotian Zhang a écrit :
> > When da9055_device_init() fails after regmap_add_irq_chip()
> > succeeds but mfd_add_devices() fails, the error handling path
> > only calls mfd_remove_devices() but forgets to call
> > regmap_del_irq_chip(). This results in a resource leak.
> > 
> > Fix this by adding regmap_del_irq_chip() to the error path so
> > that resources are released properly.
> > 
> > Fixes: 2896434cf272 ("mfd: DA9055 core driver")
> > Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
> > ---
> >   drivers/mfd/da9055-core.c | 1 +
> >   1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/mfd/da9055-core.c b/drivers/mfd/da9055-core.c
> > index 1f727ef60d63..8c989b74f924 100644
> > --- a/drivers/mfd/da9055-core.c
> > +++ b/drivers/mfd/da9055-core.c
> > @@ -388,6 +388,7 @@ int da9055_device_init(struct da9055 *da9055)
> >   err:
> >   	mfd_remove_devices(da9055->dev);
> 
> I don't think that mfd_remove_devices() is needed here. Looks harmless, but
> should mfd_add_devices() fail, this clean-up is already done (see [1]).
> 
> CJ
> 
> [1]:
> https://elixir.bootlin.com/linux/v6.17.1/source/drivers/mfd/mfd-core.c#L337

Agree.  I look forward to your patch.

-- 
Lee Jones [李琼斯]

Re: (subset) [PATCH] mfd: da9055: Fix missing regmap_del_irq_chip() in error path

[Lee Jones]

On Fri, 10 Oct 2025 09:17:36 +0800, Haotian Zhang wrote:
> When da9055_device_init() fails after regmap_add_irq_chip()
> succeeds but mfd_add_devices() fails, the error handling path
> only calls mfd_remove_devices() but forgets to call
> regmap_del_irq_chip(). This results in a resource leak.
> 
> Fix this by adding regmap_del_irq_chip() to the error path so
> that resources are released properly.
> 
> [...]

Applied, thanks!

[1/1] mfd: da9055: Fix missing regmap_del_irq_chip() in error path
      commit: be8512ed15826a24f4599ac48dd6168f9647d47d

--
Lee Jones [李琼斯]