drm/amd/display: Check pipe offset before setting vblank
[ Upstream commit 5396a70e ] pipe_ctx has a size of MAX_PIPES so checking its index before accessing the array. This fixes an OVERRUN issue reported by Coverity. Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com> Acked-by: Wayne Lin <wayne.lin@amd.com> Signed-off-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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