drm/amd/display: Ensure array index tg_inst won't be -1

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2024-46730 · Microsoft / collected KEV context

cve-program · CVE-2024-46730

• https://git.kernel.org/stable/c/1de84b6d65a7df30b5edc7208f828c4ecc8a7154
• https://git.kernel.org/stable/c/15403445b873a4ce45b2d4ecfb5928a025297282
• https://git.kernel.org/stable/c/a64284b9e1999ad5580debced4bc6d6adb28aad4
• https://git.kernel.org/stable/c/687fe329f18ab0ab0496b20ed2cb003d4879d931

• drm/amd/display: Ensure array index tg_inst won't be -1 · Affected-version evidence changed · 30 Oct 2026