From: Dave Airlie <airlied@gmail.com>
To: dri-devel@lists.sf.net
Subject: [PATCH] drm/radeon/kms: don't crash is no DDC bus on VGA connector.
Date: Mon, 8 Feb 2010 13:19:03 +1000 [thread overview]
Message-ID: <1265599143-31297-1-git-send-email-airlied@gmail.com> (raw)
From: Dave Airlie <airlied@redhat.com>
This is strange - like really really strange, twilight zone of strange.
VGA ports have DDC buses, but sometimes for some reasons the BIOS
says we don't and we oops.
reported on irc by nirbheek
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/radeon/radeon_connectors.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 2d8e5a7..a013ff5 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -580,16 +580,18 @@ static enum drm_connector_status radeon_vga_detect(struct drm_connector *connect
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
struct drm_encoder *encoder;
struct drm_encoder_helper_funcs *encoder_funcs;
- bool dret;
+ bool dret = false;
enum drm_connector_status ret = connector_status_disconnected;
encoder = radeon_best_single_encoder(connector);
if (!encoder)
ret = connector_status_disconnected;
- radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
- dret = radeon_ddc_probe(radeon_connector);
- radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
+ if (radeon_connector->ddc_bus) {
+ radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
+ dret = radeon_ddc_probe(radeon_connector);
+ radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
+ }
if (dret) {
if (radeon_connector->edid) {
kfree(radeon_connector->edid);
--
1.6.5.2
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reply other threads:[~2010-02-08 3:19 UTC|newest]
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