On Fri, Sep 22, 2023 at 08:51:17AM -0700, Nathan Chancellor wrote:
> When building with clang:
>
> drivers/gpu/drm/mediatek/mtk_drm_gem.c:255:10: error: incompatible integer to pointer conversion returning 'int' from a function with result type 'void *' [-Wint-conversion]
> 255 | return -ENOMEM;
> | ^~~~~~~
> 1 error generated.
>
> GCC reports the same issue as a warning, rather than an error.
>
> Prior to commit 7e542ff8b463 ("drm/mediatek: Use struct dma_buf_map in
> GEM vmap ops"), this function returned a pointer rather than an integer.
> This function is indirectly called in drm_gem_vmap(), which treats NULL
> as -ENOMEM through an error pointer. Return NULL in this block to
> resolve the warning but keep the same end result.
>
> Fixes: 43f561e809aa ("drm/mediatek: Fix potential memory leak if vmap() fail")
> Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
> ---
> This is a fix for a 5.10 backport, so it has no upstream relevance but
> I've still cc'd the relevant maintainers in case they have any comments
> or want to double check my work.
Now queued up, thanks.
greg k-h
