drm/i915/dsi: filter invalid backlight and CABC ports
[ Upstream commit 607f4176 ] Avoid using ports that aren't initialized in case the VBT backlight or CABC ports have invalid values. This fixes a NULL pointer dereference of intel_dsi->dsi_hosts[port] in such cases. Cc: stable@vger.kernel.org Signed-off-by:Jani Nikula <jani.nikula@intel.com> Reviewed-by:
Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/b0f4f087866257d280eb97d6bcfcefd109cc5fa2.1660664162.git.jani.nikula@intel.com (cherry picked from commit f4a6c7a4 ) Signed-off-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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