Re: [PATCH 6.6.y] drm/amd/display: Pass non-null to dcn20_validate_apply_pipe_split_flags

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On Tue, Feb 18, 2025 at 03:16:59PM +0800, Xiangyu Chen wrote:
> From: Alex Hung <alex.hung@xxxxxxx>
> 
> [ upstream commit 5559598742fb4538e4c51c48ef70563c49c2af23 ]
> 
> [WHAT & HOW]
> "dcn20_validate_apply_pipe_split_flags" dereferences merge, and thus it
> cannot be a null pointer. Let's pass a valid pointer to avoid null
> dereference.
> 
> This fixes 2 FORWARD_NULL issues reported by Coverity.
> 
> Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@xxxxxxx>
> Signed-off-by: Jerry Zuo <jerry.zuo@xxxxxxx>
> Signed-off-by: Alex Hung <alex.hung@xxxxxxx>
> Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
> [dcn20 and dcn21 were moved from drivers/gpu/drm/amd/display/dc to
> drivers/gpu/drm/amd/display/dc/resource since
> 8b8eed05a1c6 ("drm/amd/display: Refactor resource into component directory").
> The path is changed accordingly to apply the patch on 6.6.y.]
> Signed-off-by: Xiangyu Chen <xiangyu.chen@xxxxxxxxxxxxx>
> Signed-off-by: He Zhe <zhe.he@xxxxxxxxxxxxx>
> ---
> Verified the build test only due to we don't have dcn20/dcn21 device.

Again, as you don't have this device, why do you want it backported?

thanks,

greg k-h




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