build failure of next-20220830 due to 5f8cdece42ff ("drm/msm/dsi: switch to DRM_PANEL_BRIDGE")

build failure of next-20220830 due to 5f8cdece42ff ("drm/msm/dsi: switch to DRM_PANEL_BRIDGE")

[Sudip Mukherjee (Codethink)]

Hi All,

The builds of arm64 allmodconfig with clang have failed to build
next-20220830 with the error:

drivers/gpu/drm/msm/dsi/dsi_host.c:1903:14: error: variable 'device_node' is uninitialized when used here [-Werror,-Wuninitialized]
        of_node_put(device_node);
                    ^~~~~~~~~~~
drivers/gpu/drm/msm/dsi/dsi_host.c:1870:44: note: initialize the variable 'device_node' to silence this warning
        struct device_node *endpoint, *device_node;
                                                  ^
                                                   = NULL

git bisect pointed to 5f8cdece42ff ("drm/msm/dsi: switch to DRM_PANEL_BRIDGE")

I will be happy to test any patch or provide any extra log if needed.


-- 
Regards
Sudip

Re: build failure of next-20220830 due to 5f8cdece42ff ("drm/msm/dsi: switch to DRM_PANEL_BRIDGE")

[Nathan Chancellor]

Hi Sudip,

On Tue, Aug 30, 2022 at 10:18:43AM +0100, Sudip Mukherjee (Codethink) wrote:
> Hi All,
> 
> The builds of arm64 allmodconfig with clang have failed to build
> next-20220830 with the error:
> 
> drivers/gpu/drm/msm/dsi/dsi_host.c:1903:14: error: variable 'device_node' is uninitialized when used here [-Werror,-Wuninitialized]
>         of_node_put(device_node);
>                     ^~~~~~~~~~~
> drivers/gpu/drm/msm/dsi/dsi_host.c:1870:44: note: initialize the variable 'device_node' to silence this warning
>         struct device_node *endpoint, *device_node;
>                                                   ^
>                                                    = NULL
> 
> git bisect pointed to 5f8cdece42ff ("drm/msm/dsi: switch to DRM_PANEL_BRIDGE")
> 
> I will be happy to test any patch or provide any extra log if needed.

Thanks for the report. I noticed this yesterday and sent a patch:

https://lore.kernel.org/20220829165450.217628-1-nathan@kernel.org/
https://github.com/ClangBuiltLinux/linux/issues/1700

Cheers,
Nathan

Re: build failure of next-20220830 due to 5f8cdece42ff ("drm/msm/dsi: switch to DRM_PANEL_BRIDGE")

[Dmitry Baryshkov]

Hi,

On 30/08/2022 15:40, Nathan Chancellor wrote:
> Hi Sudip,
> 
> On Tue, Aug 30, 2022 at 10:18:43AM +0100, Sudip Mukherjee (Codethink) wrote:
>> Hi All,
>>
>> The builds of arm64 allmodconfig with clang have failed to build
>> next-20220830 with the error:
>>
>> drivers/gpu/drm/msm/dsi/dsi_host.c:1903:14: error: variable 'device_node' is uninitialized when used here [-Werror,-Wuninitialized]
>>          of_node_put(device_node);
>>                      ^~~~~~~~~~~
>> drivers/gpu/drm/msm/dsi/dsi_host.c:1870:44: note: initialize the variable 'device_node' to silence this warning
>>          struct device_node *endpoint, *device_node;
>>                                                    ^
>>                                                     = NULL
>>
>> git bisect pointed to 5f8cdece42ff ("drm/msm/dsi: switch to DRM_PANEL_BRIDGE")
>>
>> I will be happy to test any patch or provide any extra log if needed.
> 
> Thanks for the report. I noticed this yesterday and sent a patch:
> 
> https://lore.kernel.org/20220829165450.217628-1-nathan@kernel.org/
> https://github.com/ClangBuiltLinux/linux/issues/1700

Updated and pushed the branch to unbreak the linux-next. Thank you!

> 
> Cheers,
> Nathan

-- 
With best wishes
Dmitry