Dave Airlie | 1 May 12:16 2011
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[PATCH] drm/radeon: fix regression on atom cards with hardcoded EDID record.

From: Dave Airlie <airlied <at> redhat.com>

Since fafcf94e2b5732d1e13b440291c53115d2b172e9 introduced an edid size, it seems to have broken this path.

This manifest as oops on T500 Lenovo laptops with dual graphics primarily.

Should fix: https://bugzilla.kernel.org/show_bug.cgi?id=33812

Signed-off-by: Dave Airlie <airlied <at> redhat.com>
cc: stable <at> kernel.org
---
 drivers/gpu/drm/radeon/radeon_atombios.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index f5d12fb..f116516 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
 <at>  <at>  -1599,9 +1599,10  <at>  <at>  struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct
 							memcpy((u8 *)edid, (u8 *)&fake_edid_record->ucFakeEDIDString[0],
 							       fake_edid_record->ucFakeEDIDLength);

-							if (drm_edid_is_valid(edid))
+							if (drm_edid_is_valid(edid)) {
 								rdev->mode_info.bios_hardcoded_edid = edid;
-							else
+								rdev->mode_info.bios_hardcoded_edid_size = edid_size;
+							} else
 								kfree(edid);
 						}
 					}
--

-- 
1.7.4.2

Gmane