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authorLinus Torvalds <torvalds@linux-foundation.org>2021-10-15 10:09:09 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2021-10-15 10:09:09 -0400
commit591a495d440ff8dd2b51a47eb6053c83f68a7f6b (patch)
treead56a2d174062993fa3ab31569173b86f8526011 /drivers/gpu/drm/drm_edid.c
parent86a44e9067c95083d5dbf5a140e3f4560e5af1ca (diff)
parenta14bc107edd0c108bda2245e50daa22f91c95d20 (diff)
downloadlinux-591a495d440ff8dd2b51a47eb6053c83f68a7f6b.tar.bz2
Merge tag 'drm-fixes-2021-10-15-1' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie: "It has a few scattered msm and i915 fixes, a few core fixes and a mediatek feature revert. I've had to pick a bunch of patches into this, as the drm-misc-fixes tree had a bunch of vc4 patches I wasn't comfortable with sending to you at least as part of this, they were delayed due to your reverts. If it's really useful as fixes I'll do a separate pull. Summary: Core: - clamp fbdev size - edid cap blocks read to avoid out of bounds panel: - fix missing crc32 dependency msm: - Fix a new crash on dev file close if the dev file was opened when GPU is not loaded (such as missing fw in initrd) - Switch to single drm_sched_entity per priority level per drm_file to unbreak multi-context userspace - Serialize GMU access to fix GMU OOB errors - Various error path fixes - A couple integer overflow fixes - Fix mdp5 cursor plane WARNs i915: - Fix ACPI object leak - Fix context leak in user proto-context creation - Fix missing i915_sw_fence_fini call hyperv: - hide hw pointer nouveau: - fix engine selection bit r128: - fix UML build rcar-du: - unconncted LVDS regression fix mediatek: - revert CMDQ refinement patches" * tag 'drm-fixes-2021-10-15-1' of git://anongit.freedesktop.org/drm/drm: (34 commits) drm/panel: olimex-lcd-olinuxino: select CRC32 drm/r128: fix build for UML drm/nouveau/fifo: Reinstate the correct engine bit programming drm/hyperv: Fix double mouse pointers drm/fbdev: Clamp fbdev surface size if too large drm/edid: In connector_bad_edid() cap num_of_ext by num_blocks read drm/i915: Free the returned object of acpi_evaluate_dsm() drm/i915: Fix bug in user proto-context creation that leaked contexts drm: rcar-du: Don't create encoder for unconnected LVDS outputs drm/msm/dsi: fix off by one in dsi_bus_clk_enable error handling drm/msm/dsi: Fix an error code in msm_dsi_modeset_init() drm/msm/dsi: dsi_phy_14nm: Take ready-bit into account in poll_for_ready drm/msm/dsi/phy: fix clock names in 28nm_8960 phy drm/msm/dpu: Fix address of SM8150 PINGPONG5 IRQ register drm/msm: Do not run snapshot on non-DPU devices drm/msm/a3xx: fix error handling in a3xx_gpu_init() drm/msm/a4xx: fix error handling in a4xx_gpu_init() drm/msm: Fix null pointer dereference on pointer edp drm/msm/mdp5: fix cursor-related warnings drm/msm: Avoid potential overflow in timeout_to_jiffies() ...
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
-rw-r--r--drivers/gpu/drm/drm_edid.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 6325877c5fd6..ea9a79bc9583 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1834,11 +1834,20 @@ static void connector_bad_edid(struct drm_connector *connector,
u8 *edid, int num_blocks)
{
int i;
- u8 num_of_ext = edid[0x7e];
+ u8 last_block;
+
+ /*
+ * 0x7e in the EDID is the number of extension blocks. The EDID
+ * is 1 (base block) + num_ext_blocks big. That means we can think
+ * of 0x7e in the EDID of the _index_ of the last block in the
+ * combined chunk of memory.
+ */
+ last_block = edid[0x7e];
/* Calculate real checksum for the last edid extension block data */
- connector->real_edid_checksum =
- drm_edid_block_checksum(edid + num_of_ext * EDID_LENGTH);
+ if (last_block < num_blocks)
+ connector->real_edid_checksum =
+ drm_edid_block_checksum(edid + last_block * EDID_LENGTH);
if (connector->bad_edid_counter++ && !drm_debug_enabled(DRM_UT_KMS))
return;