[PATCH] i2c: also convert placeholder function to return errno

[PATCH] i2c: also convert placeholder function to return errno

[Wolfram Sang]

All i2c_new_device-alike functions return ERR_PTR these days, but this
fallback function was missed.

Fixes: 2dea645ffc21 ("i2c: acpi: Return error pointers from i2c_acpi_new_device()")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

I recall that -ENOSYS is returned in case something is not compiled in.
I am open for -ENODEV if this is deemed better...

 include/linux/i2c.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index b8b8963f8bb9..83fe48304781 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -1001,7 +1001,7 @@ static inline u32 i2c_acpi_find_bus_speed(struct device *dev)
 static inline struct i2c_client *i2c_acpi_new_device(struct device *dev,
 					int index, struct i2c_board_info *info)
 {
-	return NULL;
+	return ERR_PTR(-ENOSYS);
 }
 static inline struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
 {
-- 
2.27.0

Re: [PATCH] i2c: also convert placeholder function to return errno

[Andy Shevchenko]

On Sat, Jul 25, 2020 at 04:07:36PM +0200, Wolfram Sang wrote:
> All i2c_new_device-alike functions return ERR_PTR these days, but this
> fallback function was missed.

I think either will work.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Thanks!

> Fixes: 2dea645ffc21 ("i2c: acpi: Return error pointers from i2c_acpi_new_device()")
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> ---
> 
> I recall that -ENOSYS is returned in case something is not compiled in.
> I am open for -ENODEV if this is deemed better...
> 
>  include/linux/i2c.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/linux/i2c.h b/include/linux/i2c.h
> index b8b8963f8bb9..83fe48304781 100644
> --- a/include/linux/i2c.h
> +++ b/include/linux/i2c.h
> @@ -1001,7 +1001,7 @@ static inline u32 i2c_acpi_find_bus_speed(struct device *dev)
>  static inline struct i2c_client *i2c_acpi_new_device(struct device *dev,
>  					int index, struct i2c_board_info *info)
>  {
> -	return NULL;
> +	return ERR_PTR(-ENOSYS);
>  }
>  static inline struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
>  {
> -- 
> 2.27.0
> 

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH] i2c: also convert placeholder function to return errno

[Wolfram Sang]

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On Sat, Jul 25, 2020 at 04:07:36PM +0200, Wolfram Sang wrote:
> All i2c_new_device-alike functions return ERR_PTR these days, but this
> fallback function was missed.
> 
> Fixes: 2dea645ffc21 ("i2c: acpi: Return error pointers from i2c_acpi_new_device()")
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Changed to ENODEV (because of checkpatch warning) and applied to
for-current, thanks!


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