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authorAlex Deucher <alexander.deucher@amd.com>2014-07-14 17:57:19 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-28 07:06:46 -0700
commitb63dd4c81b9eccf95c1d08775bb7f2d05d70c8f1 (patch)
tree23f334f295788e4dea33ff18a865586bee0e8f08
parented379762fda2d66dd4907035c79467daafe7d70b (diff)
drm/radeon: avoid leaking edid data
commit 0ac66effe7fcdee55bda6d5d10d3372c95a41920 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/gpu/drm/radeon/radeon_display.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 60404f4b2446..adc9bfd4d82f 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -709,6 +709,10 @@ 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);
@@ -748,6 +752,7 @@ 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);