[PATCH 3.18 037/183] drm/radeon: fix sad_count check for dce3

Greg Kroah-Hartman
2015-01-25T18:59:25Z

From: Alex Deucher <alexander.deucher@amd.com>

commit 5665c3ebe5ee8a2c516925461f7214ba59c2e6d7 upstream.

Make it consistent with the sad code for other asics to deal
with monitors that don't report sads.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=89461

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/radeon/dce3_1_afmt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/dce3_1_afmt.c
+++ b/drivers/gpu/drm/radeon/dce3_1_afmt.c
@@ -103,7 +103,7 @@ static void dce3_2_afmt_write_sad_regs(s
}

sad_count = drm_edid_to_sad(radeon_connector->edid, &sads);
- if (sad_count < 0) {
+ if (sad_count <= 0) {
DRM_ERROR("Couldn't read SADs: %d\n", sad_count);
return;
}