drm/radeon: avoid leaking edid data
authorAlex Deucher <alexander.deucher@amd.com>
Mon, 14 Jul 2014 21:57:19 +0000 (17:57 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Thu, 17 Jul 2014 13:01:29 +0000 (09:01 -0400)
In some cases we fetch the edid in the detect() callback
in order to determine what sort of monitor is connected.
If that happens, don't fetch the edid again in the get_modes()
callback or we will leak the edid.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
drivers/gpu/drm/radeon/radeon_display.c

index 13896edcf0b6507337e728269732e4c391883115..65501af453beb0d917cb24e58846dbe91ac76b74 100644 (file)
@@ -830,6 +830,10 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
        struct radeon_device *rdev = dev->dev_private;
        int ret = 0;
 
+       /* don't leak the edid if we already fetched it in detect() */
+       if (radeon_connector->edid)
+               goto got_edid;
+
        /* on hw with routers, select right port */
        if (radeon_connector->router.ddc_valid)
                radeon_router_select_ddc_port(radeon_connector);
@@ -868,6 +872,7 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
                        radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
        }
        if (radeon_connector->edid) {
+got_edid:
                drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
                ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
                drm_edid_to_eld(&radeon_connector->base, radeon_connector->edid);