[Intel-gfx] [PATCH v2] drm/i915: Initialize the mbus_offset to fix static analysis issue

[Rodrigo Vivi]

On Thu, Jun 03, 2021 at 03:07:54PM -0700, Manasi Navare wrote:
> Static analysis identified an issue in skl_crtc_allocate_ddb where
> mbus_offset may be used uninitialized.
> This patch fixes it.

I'm sorry, but I really cannot see what this tool is seeing...
I even tried to look to our internal branch to see if it was an issue
there.
But I'm failing to see how it is possible...

> 
> Fixes: 835c176cb1c4 ("drm/i915: Introduce MBUS relative dbuf offsets")
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 00f3dead20ad..a385b8b7414f 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -4163,7 +4163,7 @@ skl_crtc_allocate_ddb(struct intel_atomic_state *state, struct intel_crtc *crtc)
>  	struct intel_crtc_state *crtc_state;
>  	struct skl_ddb_entry ddb_slices;
>  	enum pipe pipe = crtc->pipe;
> -	unsigned int mbus_offset;
> +	unsigned int mbus_offset = 0;
>  	u32 ddb_range_size;
>  	u32 dbuf_slice_mask;
>  	u32 start, end;
> -- 
> 2.19.1
> 
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