drm/nouveau: we can't free ACPI EDID, so make a copy that we can

The rest of the connector code assumes we can kfree() the EDID pointer.
This causes things to blow up with the ACPI EDID pointer we get
passed.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index c17a055..1191526 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -292,6 +292,6 @@ nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
        if (ret < 0)
                return ret;
 
-       nv_connector->edid = edid;
+       nv_connector->edid = kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
        return 0;
 }