drm/i915/acpi: free _DSM package when no connectors

acpi_evaluate_dsm_typed() returns an ACPI package in pkg.
When pkg->package.count == 0, we returned without freeing pkg,
leaking memory. Free pkg before returning on the empty case.

Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Fixes: 337d7a1621c7 ("drm/i915: Fix invalid access to ACPI _DSM objects")
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patch.msgid.link/20260109032549.1826303-1-kaushlendra.kumar@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit c0a27a0ca8a34e96d08bb05a2c5d5ccf63fb8dc0)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c
index 68c0193..e06f324 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_acpi.c
+++ b/drivers/gpu/drm/i915/display/intel_acpi.c
@@ -96,6 +96,7 @@ static void intel_dsm_platform_mux_info(acpi_handle dhandle)
 
        if (!pkg->package.count) {
                DRM_DEBUG_DRIVER("no connection in _DSM\n");
+               ACPI_FREE(pkg);
                return;
        }