drm/edid: Remove arbitrary EDID extension limit

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 2becdeda68a3..20f38b85c70a 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -450,17 +450,17 @@ bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev)
 {
         int edid_info;
         struct edid *edid;
+        unsigned char *raw;
         edid_info = combios_get_table_offset(rdev->ddev, COMBIOS_HARDCODED_EDID_TABLE);
         if (!edid_info)
                 return false;
 
-        edid = kmalloc(EDID_LENGTH * (DRM_MAX_EDID_EXT_NUM + 1),
-                       GFP_KERNEL);
+        raw = rdev->bios + edid_info;
+        edid = kmalloc(EDID_LENGTH * (raw[0x7e] + 1), GFP_KERNEL);
         if (edid == NULL)
                 return false;
 
-        memcpy((unsigned char *)edid,
-               (unsigned char *)(rdev->bios + edid_info), EDID_LENGTH);
+        memcpy((unsigned char *)edid, raw, EDID_LENGTH * (raw[0x7e] + 1));
 
         if (!drm_edid_is_valid(edid)) {
                 kfree(edid);