[PATCH v1 1/2] ipack: Fail earlier for drivers without probe function

[PATCH v1 1/2] ipack: Fail earlier for drivers without probe function

[Uwe Kleine-König]

A driver without a probe function isn't useful as it can never be used.
Let registering such a driver fail already instead of failing every
binding.

This is only cosmetic as there is no ipack driver without a probe function.

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
---
 drivers/ipack/ipack.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/ipack/ipack.c b/drivers/ipack/ipack.c
index 9267a85fee18..eabc4d08792a 100644
--- a/drivers/ipack/ipack.c
+++ b/drivers/ipack/ipack.c
@@ -64,9 +64,6 @@ static int ipack_bus_probe(struct device *device)
 	struct ipack_device *dev = to_ipack_dev(device);
 	struct ipack_driver *drv = to_ipack_driver(device->driver);
 
-	if (!drv->ops->probe)
-		return -EINVAL;
-
 	return drv->ops->probe(dev);
 }
 
@@ -252,6 +249,9 @@ EXPORT_SYMBOL_GPL(ipack_bus_unregister);
 int ipack_driver_register(struct ipack_driver *edrv, struct module *owner,
 			  const char *name)
 {
+	if (!edrv->ops->probe)
+		return -EINVAL;
+
 	edrv->driver.owner = owner;
 	edrv->driver.name = name;
 	edrv->driver.bus = &ipack_bus_type;

base-commit: 5c8fe583cce542aa0b84adc939ce85293de36e5e
-- 
2.29.2

[PATCH v1 2/2] ipack: Handle a driver without remove callback

[Uwe Kleine-König]

A driver that only consumes devm-managed resources might well have no
remove callback. Additionally given that the device core ignores the return
value of ipack_bus_remove() stop returning an error code.

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
---
 drivers/ipack/ipack.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/ipack/ipack.c b/drivers/ipack/ipack.c
index eabc4d08792a..7de9605cac4f 100644
--- a/drivers/ipack/ipack.c
+++ b/drivers/ipack/ipack.c
@@ -72,10 +72,9 @@ static int ipack_bus_remove(struct device *device)
 	struct ipack_device *dev = to_ipack_dev(device);
 	struct ipack_driver *drv = to_ipack_driver(device->driver);
 
-	if (!drv->ops->remove)
-		return -EINVAL;
+	if (drv->ops->remove)
+		drv->ops->remove(dev);
 
-	drv->ops->remove(dev);
 	return 0;
 }
 
-- 
2.29.2

Re: [Industrypack-devel] [PATCH v1 1/2] ipack: Fail earlier for drivers without probe function

[Samuel Iglesias Gonsálvez]

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Hi Uwe,

Thanks for the patches!

Patch series is,

Acked-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>

Greg, Would you mind picking this patch series through your char-misc
tree?

Thanks!

Sam

On Sun, 2021-02-07 at 22:55 +0100, Uwe Kleine-König wrote:
> A driver without a probe function isn't useful as it can never be
> used.
> Let registering such a driver fail already instead of failing every
> binding.
> 
> This is only cosmetic as there is no ipack driver without a probe
> function.
> 
> Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
> ---
>  drivers/ipack/ipack.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/ipack/ipack.c b/drivers/ipack/ipack.c
> index 9267a85fee18..eabc4d08792a 100644
> --- a/drivers/ipack/ipack.c
> +++ b/drivers/ipack/ipack.c
> @@ -64,9 +64,6 @@ static int ipack_bus_probe(struct device *device)
>         struct ipack_device *dev = to_ipack_dev(device);
>         struct ipack_driver *drv = to_ipack_driver(device->driver);
>  
> -       if (!drv->ops->probe)
> -               return -EINVAL;
> -
>         return drv->ops->probe(dev);
>  }
>  
> @@ -252,6 +249,9 @@ EXPORT_SYMBOL_GPL(ipack_bus_unregister);
>  int ipack_driver_register(struct ipack_driver *edrv, struct module
> *owner,
>                           const char *name)
>  {
> +       if (!edrv->ops->probe)
> +               return -EINVAL;
> +
>         edrv->driver.owner = owner;
>         edrv->driver.name = name;
>         edrv->driver.bus = &ipack_bus_type;
> 
> base-commit: 5c8fe583cce542aa0b84adc939ce85293de36e5e


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Re: [Industrypack-devel] [PATCH v1 1/2] ipack: Fail earlier for drivers without probe function

[Greg Kroah-Hartman]

On Tue, Feb 09, 2021 at 09:40:12AM +0100, Samuel Iglesias Gonsálvez wrote:
> Hi Uwe,
> 
> Thanks for the patches!
> 
> Patch series is,
> 
> Acked-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
> 
> Greg, Would you mind picking this patch series through your char-misc
> tree?

Will be glad to, thanks!

greg k-h